UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

   CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

                  Investment Company Act file number 811-07896
                                                    -------------

                         GAMCO Global Series Funds, Inc.
            -------------------------------------------------------
               (Exact name of registrant as specified in charter)

                              One Corporate Center
                            Rye, New York 10580-1422
            -------------------------------------------------------
               (Address of principal executive offices) (Zip code)

                                 Bruce N. Alpert
                               Gabelli Funds, LLC
                              One Corporate Center
                            Rye, New York 10580-1422
            -------------------------------------------------------
                     (Name and address of agent for service)


       registrant's telephone number, including area code: 1-800-422-3554
                                                          ----------------

                      Date of fiscal year end: December 31

                   Date of reporting period: December 31, 2005


Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the  transmission to stockholders of
any report that is required to be transmitted to  stockholders  under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1).  The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant  is required to disclose the  information  specified by Form N-CSR,
and the  Commission  will make this  information  public.  A  registrant  is not
required to respond to the  collection  of  information  contained in Form N-CSR
unless the Form  displays a  currently  valid  Office of  Management  and Budget
("OMB")  control number.  Please direct comments  concerning the accuracy of the
information  collection  burden  estimate and any  suggestions  for reducing the
burden to  Secretary,  Securities  and Exchange  Commission,  100 F Street,  NE,
Washington,  DC 20549. The OMB has reviewed this collection of information under
the clearance requirements of 44 U.S.C. ss. 3507.



ITEM 1. REPORTS TO STOCKHOLDERS.

The Report to Shareholders is attached herewith.


                  THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND

                                  ANNUAL REPORT
                                DECEMBER 31, 2005


TO OUR SHAREHOLDERS,

      The Sarbanes-Oxley Act requires a Fund's principal executive and financial
officers  to  certify  the  entire   contents  of  the  semi-annual  and  annual
shareholder  reports in a filing with the Securities and Exchange  Commission on
Form N-CSR. This certification  would cover the portfolio  manager's  commentary
and  subjective  opinions  if they are  attached  to or a part of the  financial
statements. Many of these comments and opinions would be difficult or impossible
to certify.

      Because we do not want our portfolio  managers to eliminate their opinions
and/or  restrict their  commentary to historical  facts, we have separated their
commentary from the financial  statements and investment portfolio and have sent
it to  you  separately.  Both  the  commentary  and  the  financial  statements,
including  the  portfolio  of  investments,  will be available on our website at
www.gabelli.com/funds.

      Enclosed are the audited financial statements and the investment portfolio
as of  December  31,  2005 with a  description  of  factors  that  affected  the
performance during the past year.

PERFORMANCE DISCUSSION

      We are  pleased  to  report  that last  year,  your Fund not only beat its
benchmark,  but also finished first out of the entire universe of 75 convertible
securities funds monitored by Lipper*.  For the five and ten year periods ending
December  31, 2005,  the Fund's Class AAA Shares  ranked 30th and 31st out of 56
and 32 convertible  securities funds monitored by Lipper,  respectively.  During
the twelve month period ended December 31, 2005, the Fund generated a total rate
of  return  of +8.0%,  which  includes  reinvestment  of its  regular  quarterly
distributions  of three cents per share.  This  compares to its  benchmark,  the
Merrill Lynch Global 300 Convertible Index, which gained +0.2% in 2005.

      In  addition  to   outperforming   its  benchmark   last  year,  the  Fund
outperformed  investment  grade (-3.7%) and speculative  grade bonds (+1.5%) and
participated  in 84% of the return from global equity markets  (+9.5%) with less
risk.  Over this  period,  firmer  global  equity  markets,  and our over weight
allocations to energy and Japan assisted  performance.  Forced  liquidations  by
convertible  arbitrage hedge funds,  wider credit  spreads,  and a stronger U.S.
dollar hindered  results,  while the impact of equity market volatility and long
term interest rates were broadly neutral.

      The  Fund's top five  performing  investments  in 2005,  which were in the
portfolio as of the  beginning  of the year,  included  Arch Coal Inc.  (+115%),
Heiwa Real Estate (+107%), Mitsui Fudosan Co. Ltd. (+52%), Futaba Industrial Co.
Ltd. (+36%),  and Hon Hai Precision  Industry Co. Ltd.  (+31%).  Disappointments
included  General Motors Corp.  (-35%),  Liberty Media Corp.  exchangeable  into
Viacom  (-24%),  Elektrim  Financial BV (-16%),  Standard  Motor  Products  Inc.
(-13%), and Sovereign Bancorp. Inc. (-11%).

                                                           Sincerely yours,

                                                           /s/ Bruce N. Alpert

                                                           Bruce N. Alpert
                                                           President
February 13, 2006

* Lipper, a Reuters company, is a leading provider of mutual fund industry data,
  classifies funds in their appropriate investment  category,  and monitors fund
  performance.

                               [GRAPHIC OMITTED]
                              PLOT POINTS FOLLOW:

   COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN THE GAMCO GLOBAL
CONVERTIBLE SECURITIES FUND CLASS AAA SHARES, THE LIPPER CONVERTIBLE SECURITIES
               FUND AVERAGE AND THE UBS GLOBAL CONVERTIBLE INDEX

         GAMCO Global Convertible             UBS Global           MSCI World
      Securities Fund Class AAA Shares     Convertible Index       Free Index
2/3/94            $10,000                      $10,000              $10,000
12/31/94           10,090                        9,709                9,863
12/31/95           11,363                       11,146               11,910
12/31/96           11,985                       11,883               13,520
12/31/97           12,323                       12,057               15,632
12/31/98           13,388                       14,544               19,442
12/31/99           20,229                       19,734               24,268
12/31/00           17,397                       17,683               21,070
12/31/01           15,093                       16,633               17,526
12/31/02           14,361                       16,533               14,040
12/31/03           17,446                       20,595               18,688
12/31/04           19,479                       22,482               21,439
12/31/05           21,037                       22,496               23,474

PAST PERFORMANCE IS NOT PREDICTIVE OF FUTURE RESULTS. The performance tables and
graph do not reflect the deduction of taxes that a shareholder would pay on fund
distributions or the redemption of fund shares.

COMPARATIVE RESULTS
- --------------------------------------------------------------------------------
              AVERAGE ANNUAL RETURNS THROUGH DECEMBER 31, 2005 (A)
              ----------------------------------------------------


                                                                                                             Since
                                                                                                           Inception
                                                        QUARTER   1 YEAR     3 YEAR    5 YEAR     10 YEAR  (2/3/94)
- -------------------------------------------------------------------------------------------------------------------
                                                                                           
  GAMCO GLOBAL CONVERTIBLE FUND CLASS AAA .............  4.17%      8.00%    13.57%     3.87%      6.35%     6.44%
  Merrill Lynch Global 300 Convertible Index ..........  1.39       0.18      9.43      3.97       6.00      N/A*
  UBS Global Convertible Index ........................  1.35       0.06     10.81      4.94       7.68      7.31
  MSCI World Free Index ...............................  3.06       9.49     18.69      2.18       7.02      7.42
  Class A .............................................  4.16       8.16     13.60      3.89       6.36      6.45
                                                        (1.88)(b)   1.97(b)  11.38(b)   2.68(b)    5.74(b)   5.93(b)
  Class B .............................................  4.03       7.29     12.79      3.15       5.98      6.12
                                                        (0.97)(c)   2.29(c)  12.00(c)   2.79(c)    5.98(c)   6.12(c)
  Class C .............................................  3.98       7.19     12.77      3.29       6.05      6.19
                                                         2.98(c)    6.19(c)  12.77(c)   3.29(c)    6.05(c)   6.19(c)

 (a) RETURNS  REPRESENT PAST  PERFORMANCE AND DO NOT GUARANTEE  FUTURE RESULTS.
     INVESTMENT RETURNS AND THE PRINCIPAL VALUE OF AN INVESTMENT WILL FLUCTUATE.
     TOTAL RETURNS AND AVERAGE ANNUAL RETURNS REFLECT CHANGES IN SHARE PRICE AND
     REINVESTMENT  OF  DIVIDENDS  AND  ARE  NET OF  EXPENSES.  WHEN  SHARES  ARE
     REDEEMED,  THEY MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL COST. CURRENT
     PERFORMANCE  MAY BE LOWER OR HIGHER THAN THE  PERFORMANCE  DATA  PRESENTED.
     PERFORMANCE  RETURNS  FOR  PERIODS  LESS THAN ONE YEAR ARE NOT  ANNUALIZED.
     VISIT  WWW.GABELLI.COM  FOR  PERFORMANCE  INFORMATION AS OF THE MOST RECENT
     MONTH END.  INVESTORS  SHOULD  CONSIDER THE INVESTMENT  OBJECTIVES,  RISKS,
     CHARGES,  AND  EXPENSES  OF  THE  FUND  CAREFULLY  BEFORE  INVESTING.   THE
     PROSPECTUS  CONTAINS  MORE  INFORMATION  ABOUT THIS AND OTHER  MATTERS  AND
     SHOULD  BE  READ  CAREFULLY  BEFORE  INVESTING.  OTHER  SHARE  CLASSES  ARE
     AVAILABLE  AND HAVE  DIFFERENT  PERFORMANCE  CHARACTERISTICS.  INVESTING IN
     FOREIGN   SECURITIES   INVOLVES  RISKS  NOT  ORDINARILY   ASSOCIATED   WITH
     INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING CURRENCY  FLUCTUATION,  ECONOMIC
     AND POLITICAL RISKS.
     THE CLASS AAA SHARES' NET ASSET  VALUES ARE USED TO  CALCULATE  PERFORMANCE
     FOR THE PERIODS PRIOR TO THE ISSUANCE OF CLASS A SHARES, CLASS B SHARES AND
     CLASS C SHARES  ON MAY 2,  2001,  MARCH 28,  2001 AND  NOVEMBER  26,  2001,
     RESPECTIVELY.  THE  ACTUAL  PERFORMANCE  FOR THE CLASS B SHARES AND CLASS C
     SHARES WOULD HAVE BEEN LOWER DUE TO THE ADDITIONAL EXPENSES ASSOCIATED WITH
     THESE  CLASSES OF SHARES.  THE UBS  (FORMERLY  WARBURG  DILLON REED) GLOBAL
     CONVERTIBLE  INDEX, THE MERRILL LYNCH GLOBAL 300 CONVERTIBLE  INDEX AND THE
     MORGAN STANLEY CAPITAL  INTERNATIONAL (MSCI) WORLD FREE INDEX ARE UNMANAGED
     INDICATORS OF INVESTMENT PERFORMANCE.
 (b) INCLUDES THE EFFECT OF THE MAXIMUM  5.75% SALES CHARGE AT THE BEGINNING OF
     THE PERIOD.
 (c) INCLUDES THE EFFECT OF THE APPLICABLE  CONTINGENT DEFERRED SALES CHARGE AT
     THE END OF THE PERIOD  SHOWN FOR CLASS B AND CLASS C SHARES,  RESPECTIVELY.
     CLASS B SHARES ARE NOT AVAILABLE FOR NEW PURCHASES.
   * THERE IS NO DATA  AVAILABLE  FOR THE MERRILL  LYNCH GLOBAL 300  CONVERTIBLE
     INDEX PRIOR TO DECEMBER 31, 1994.
- --------------------------------------------------------------------------------
                                       2


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
DISCLOSURE OF FUND EXPENSES (UNAUDITED)
For the Six Month Period from July 1, 2005 through December 31, 2005
                                                                   EXPENSE TABLE
================================================================================

We believe it is important for you to understand the impact of fees and expenses
regarding  your  investment.  All mutual  funds have  operating  expenses.  As a
shareholder  of a fund,  you  incur  ongoing  costs,  which  include  costs  for
portfolio  management,  administrative  services,  and shareholder reports (like
this one), among others.  Operating  expenses,  which are deducted from a fund's
gross income,  directly  reduce the investment  return of a fund.  When a fund's
expenses are expressed as a percentage of its average net assets, this figure is
known as the expense  ratio.  The  following  examples  are intended to help you
understand  the  ongoing  costs (in  dollars) of  investing  in your Fund and to
compare these costs with those of other mutual funds.  The examples are based on
an  investment  of $1,000 made at the beginning of the period shown and held for
the entire period.

The Expense Table below illustrates your Fund's costs in two ways:

ACTUAL FUND  RETURN:  This section  provides  information  about actual  account
values and actual expenses. You may use this section to help you to estimate the
actual  expenses that you paid over the period after any fee waivers and expense
reimbursements.  The "Ending  Account  Value"  shown is derived  from the Fund's
ACTUAL return during the past six months,  and the "Expenses Paid During Period"
shows the dollar  amount  that would have been paid by an  investor  who started
with $1,000 in the Fund. You may use this information,  together with the amount
you invested, to estimate the expenses that you paid over the period.

To do so, simply  divide your account  value by $1,000 (for  example,  an $8,600
account value  divided by $1,000 = 8.6),  then multiply the result by the number
given for your Fund under the heading  Expenses  Paid During  Period to estimate
the expenses you paid during this period.

HYPOTHETICAL 5% RETURN:  This section provides  information  about  hypothetical
account  values and  hypothetical  expenses  based on the Fund's actual  expense
ratio. It assumes a hypothetical  annualized return of 5% before expenses during
the period shown.  In this case -- because the  hypothetical  return used is NOT
the Fund's actual return -- the results do not apply to your  investment and you
cannot use the  hypothetical  account  value and expense to estimate  the actual
ending  account  balance or expenses  you paid for the period.  This  example is
useful in making  comparisons  of the ongoing costs of investing in the Fund and
other  funds.  To do so,  compare  this  5%  hypothetical  example  with  the 5%
hypothetical examples that appear in shareholder reports of other funds.

Please note that the  expenses  shown in the table are meant to  highlight  your
ongoing  costs only and do not  reflect  any  transactional  costs such as sales
charges (loads),  redemption fees, or exchange fees, if any, which are described
in the Prospectus. If these costs were applied to your account, your costs would
be higher.  Therefore, the 5% hypothetical return is useful in comparing ongoing
costs only,  and will not help you determine the relative  total costs of owning
different funds. The "Annualized  Expense Ratio"  represents the actual expenses
for the last six  months  and may be  different  from the  expense  ratio in the
Financial Highlights which is for the year ended December 31, 2005.

                    Beginning       Ending       Annualized     Expenses
                  Account Value  Account Value     Expense     Paid During
                    07/01/05       12/31/05         Ratio        Period*
- --------------------------------------------------------------------------------
THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Class AAA          $1,000.00      $1,107.80         2.15%        $11.42
Class A            $1,000.00      $1,107.60         2.21%        $11.74
Class B            $1,000.00      $1,103.80         2.92%        $15.48
Class C            $1,000.00      $1,104.30         2.81%        $14.90
HYPOTHETICAL 5% RETURN
Class AAA          $1,000.00      $1,014.37         2.15%        $10.92
Class A            $1,000.00      $1,014.06         2.21%        $11.22
Class B            $1,000.00      $1,010.49         2.92%        $14.80
Class C            $1,000.00      $1,011.04         2.81%        $14.24

*  Expenses are equal to the Fund's  annualized  expense  ratio for the last six
   months multiplied by the average account value over the period, multiplied by
   the number of days in the most recent fiscal half-year, then divided by 365.

                                       3


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

The following table presents portfolio holdings as a percent of total net assets
as of December 31, 2005:


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND

Electronics ........................................ 12.5%
Financial Services ................................. 11.2%
Health Care ........................................  8.8%
Real Estate ........................................  8.4%
Telecommunications .................................  7.7%
Metals and Mining ..................................  6.5%
Diversified Industrial .............................  6.4%
Automotive: Parts and Accessories ..................  5.6%
Communications Equipment ...........................  5.2%
Energy and Utilities ...............................  4.7%
Products ...........................................  3.5%
Hotels and Gaming ..................................  3.5%
Broadcasting .......................................  3.2%
Equipment and Supplies .............................  2.6%
Business Services ..................................  1.4%
Transportation .....................................  1.3%
Automotive .........................................  1.2%
Entertainment ......................................  1.1%
Paper and Forest Products ..........................  0.7%
Other Assets and Liabilities - (Net) ...............  4.5%
                                                    ------
                                                    100.0%
                                                    ======

THE FUND FILES A COMPLETE  SCHEDULE OF PORTFOLIO  HOLDINGS  WITH THE SEC FOR THE
FIRST AND THIRD  QUARTERS OF EACH FISCAL YEAR ON FORM N-Q, THE LAST OF WHICH WAS
FILED FOR THE QUARTER  ENDED  SEPTEMBER 30, 2005.  SHAREHOLDERS  MAY OBTAIN THIS
INFORMATION   AT   WWW.GABELLI.COM   OR  BY  CALLING  THE  FUND  AT  800-GABELLI
(800-422-3554).  THE  FUND'S  FORM N-Q IS  AVAILABLE  ON THE  SEC'S  WEBSITE  AT
WWW.SEC.GOV  AND MAY ALSO BE  REVIEWED  AND  COPIED AT THE  COMMISSION'S  PUBLIC
REFERENCE  ROOM IN  WASHINGTON,  DC.  INFORMATION ON THE OPERATION OF THE PUBLIC
REFERENCE ROOM MAY BE OBTAINED BY CALLING 1-800-SEC-0330.


PROXY VOTING

The Fund files Form N-PX with its complete proxy voting record for the 12 months
ended June 30th,  no later than August 31st of each year. A  description  of the
Fund's  proxy  voting  policies,  procedures,  and how the  Fund  voted  proxies
relating to portfolio securities are available without charge, upon request, (i)
by calling 800-GABELLI  (800-422-3554);  (ii) by writing to The Gabelli Funds at
One Corporate Center,  Rye, NY 10580-1422;  and (iii) by visiting the Securities
and Exchange Commission's website at www.sec.gov.

                                       4


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2005
================================================================================

   PRINCIPAL                                                         MARKET
    AMOUNT                                                COST        VALUE
   ---------                                              ----       -------
                 CONVERTIBLE CORPORATE BONDS -- 73.1%
                 AUTOMOTIVE: PARTS AND ACCESSORIES -- 5.6%
$  40,000,000(b) Futaba Industrial Co. Ltd.,
                   Cv., Zero Coupon, 09/30/09 ....... $   385,017  $   474,033
                                                      -----------  -----------
      125,000    Standard Motor Products Inc.,
                   Sub. Deb. Cv.,
                   6.750%, 07/15/09 .................     125,000      106,875
  20,000,000(b)  Suzuki Motor Corp., Cv.,
                   Zero Coupon, 03/31/10 ............     216,436      214,072
                                                      -----------  -----------
                                                          726,453      794,980
                                                      -----------  -----------
                 BUSINESS SERVICES -- 1.4%
      126,600(c) SR Teleperformance, Cv.,
                   3.250%, 01/01/08 .................     182,676      197,052
                                                      -----------  -----------
                 COMMUNICATIONS EQUIPMENT -- 5.2%
      450,000    Agere Systems Inc., Sub. Deb. Cv.,
                   6.500%, 12/15/09 .................     475,035      444,937
      250,000    Cypress Semiconductor Corp.,
                   Sub. Deb. Cv.,
                   1.250%, 06/15/08 .................     279,150      284,375
                                                      -----------  -----------
                                                          754,185      729,312
                                                      -----------  -----------
               CONSUMER PRODUCTS -- 3.5%
      170,000   Church & Dwight Co. Inc.,
                   Deb. Cv.,
                   5.250%, 08/15/33 .................     196,418      205,488
      250,000    Mens Warehouse Inc.,
                   Cv., 3.125%, 10/15/23 ............     293,818      291,250
                                                      -----------  -----------
                                                          490,236      496,738
                                                      -----------  -----------
                 DIVERSIFIED INDUSTRIAL -- 5.0%
      400,000    Roper Industries Inc., Cv.,
                   1.481%, 01/15/34 .................     167,572      221,000
   30,000,000(b) Tokai Carbon Co. Ltd.,
                   Cv.,Zero  Coupon,
                   08/08/08 .........................     285,076      294,514
       65,000    Walter Industries Inc.,
                   Sub. Deb. Cv.,
                   3.750%, 05/01/24 .................     175,587      184,762
                                                      -----------  -----------
                                                          628,235      700,276
                                                      -----------  -----------
                 ELECTRONICS -- 12.5%
      250,000    Asia Optical Co., Cv.,
                   Zero Coupon,
                   10/14/08 .........................     289,748      308,750
      300,000    Edo Corp., Sub. Deb. Cv.,
                   4.000%, 11/15/25 .................     297,759      305,625
   40,000,000(b) Hamamatsu Photonics KK, Cv.,
                   Zero Coupon,
                   09/30/09 .........................     430,456      521,907
      300,000    Hon Hai Precision Industry
                   Co. Ltd., Cv., Zero
                   Coupon, 08/08/08 .................     350,802      494,517

   PRINCIPAL                                                         MARKET
    AMOUNT                                                COST        VALUE
   ---------                                              ----       -------
$  5,000,000(b)  Ibiden Co. Ltd., Cv.,
                   Zero Coupon,
                   09/30/14 ......................... $    52,755  $   128,746
                                                      -----------  -----------
                                                        1,421,520    1,759,545
                                                      -----------  -----------
                 ENERGY AND UTILITIES -- 1.6%
      100,000    Cal Dive International Inc.,
                   Cv., 3.250%,
                   12/15/25 .........................     126,119      135,000
      100,000    Hanover Compressor Co.,
                   Cv., 4.750%, 03/15/08 ............      95,971       95,500
                                                      -----------  -----------
                                                          222,090      230,500
                                                      -----------  -----------
                 ENTERTAINMENT -- 1.1%
      200,000    Liberty Media Corp., Deb. Cv.,
                   3.250%, 03/15/31 (a) .............     200,000      151,750
                                                      -----------  -----------
                 EQUIPMENT AND SUPPLIES -- 2.6%
      275,000    Cooper Cameron Corp., Cv.,
                   1.500%, 05/15/24 .................     292,198      360,250
                                                      -----------  -----------
                 FINANCIAL SERVICES -- 7.2%
       75,000    Affiliated Managers Group Inc.,
                   Deb Cv., 3.890%,
                   02/25/33 .........................     131,538      142,656
      150,000    First Pacific Finance, Cv.,
                   Zero Coupon, 01/18/10 ............     173,442      179,854
   30,000,000(b) Mie Bank Ltd., Sub. Deb. Cv.,
                   1.800%, 09/29/06 .................     333,286      361,216
      250,000    Repcon Luxembourg SA, Cv.,
                   4.500%, 01/26/11 .................     293,024      329,300
                                                      -----------  -----------
                                                          931,290    1,013,026
                                                      -----------  -----------
                 HEALTH CARE -- 6.2%
      375,000    Fisher Scientific International
                   Inc., Sub. Deb. Cv., .............     412,506      374,531
      250,000    Manor Care Inc., Cv.,
                   2.625%, 04/15/23 .................     299,358      333,750
   10,000,000(b) Rohto Pharmaceutical Co., Cv.,
                   Zero Coupon, 09/30/08 ............     113,258      167,041
                                                      -----------  -----------
                                                          825,122      875,322
                                                      -----------  -----------
                 HOTELS AND GAMING -- 3.5%
      200,000(d) Hilton Group Finance Jersey Ltd.,
                   Cv., 3.375%, 10/02/10 ............     400,391      493,058
                                                      -----------  -----------
                 METALS AND MINING -- 3.0%
      300,000    Agnico-Eagle Mines Ltd.,
                   Sub. Deb. Cv.,
                   4.500%, 02/15/12 .................     303,657      425,250
                                                      -----------  -----------
                 REAL ESTATE -- 8.4%
   20,000,000(b) Heiwa Real Estate, Cv.,
                   Zero Coupon, 06/24/08 ............     199,403      360,877
   30,000,000(b) Kyoritsu Maintenance Co. Ltd.,
                   Cv., Zero Coupon,
                   09/30/09 .........................     301,159      459,433

                 See accompanying notes to financial statements.

                                       5


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

   PRINCIPAL                                                         MARKET
    AMOUNT                                                COST        VALUE
   ---------                                              ----       -------
                 CONVERTIBLE CORPORATE BONDS (CONTINUED)
                 REAL ESTATE (CONTINUED)
 $ 26,000,000(b) Mitsui Fudosan Co. Ltd., Cv.,
                   Zero Coupon, 07/30/10 ............ $   279,135  $   369,990
                                                      -----------  -----------
                                                          779,697    1,190,300
                                                      -----------  -----------
                 TELECOMMUNICATIONS -- 5.0%
      150,000(d) Cable & Wireless plc, Cv.,
                   4.000%, 07/16/10 .................     265,503      266,705
      225,000    Harris Corp., Deb. Cv.,
                   3.500%, 08/15/22 .................     228,552      434,250
                                                      -----------  -----------
                                                          494,055      700,955
                                                      -----------  -----------
                 TRANSPORTATION -- 1.3%
      150,000    Yellow Roadway Corp., Cv.,
                   3.375%, 11/25/23 .................     189,931      185,063
                                                      -----------  -----------
                 TOTAL CONVERTIBLE
                   CORPORATE BONDS ..................   8,841,736   10,303,377
                                                      -----------  -----------
                 CORPORATE BONDS -- 1.4%
                 DIVERSIFIED INDUSTRIAL -- 1.4%
      197,518(c) Elektrim Finance BV,
                   2.000%, 12/15/49 .................     199,783      199,783
                                                      -----------  -----------
     SHARES
     ------
                 CONVERTIBLE PREFERRED STOCKS -- 21.0%
                 AUTOMOTIVE -- 1.2%
       11,000    General Motors Corp.,
                   5.250% Cv. Pfd.,
                   Ser. B ...........................     252,934      163,900
                                                      -----------  -----------
                 BROADCASTING -- 3.2%
       10,000    Emmis Communications Corp.,
                   6.250% Cv. Pfd.,
                   Ser. A ...........................     462,275      445,800
                                                      -----------  -----------
                 ENERGY AND UTILITIES -- 3.1%
        1,000    Arch Coal Inc.,
                   5.000% Cv. Pfd. ..................      57,750      194,100
        5,000    Hanover Compressor Capital Trust,
                   7.250% Cv. Pfd. ..................     241,250      246,875
                                                      -----------  -----------
                                                          299,000      440,975
                                                      -----------  -----------
                 FINANCIAL SERVICES -- 4.0%
       16,450    Central Parking Financial Trust,
                   5.250% Cv. Pfd. ..................     332,850      333,935
        1,000    Doral Financial Corp.,
                   4.750% Cv. Pfd. ..................     195,000      159,000
        1,500    Sovereign Bancorp Inc.,
                   4.375% Cv. Pfd. ..................      70,182       66,000
                                                      -----------  -----------
                                                          598,032      558,935
                                                      -----------  -----------
                 HEALTH CARE -- 2.6%
        5,000    Omnicare Inc.,4.000% Cv. Pfd.,
                   Ser. B ...........................     254,375      371,350
                                                      -----------  -----------

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
                 METALS AND MINING -- 3.5%
          420    Freeport-McMoRan
                   Copper & Gold Inc.,
                   5.500% Cv. Pfd. .................. $   410,950  $   493,185
                                                      -----------  -----------
                 PAPER AND FOREST PRODUCTS -- 0.7%
        2,000    Amcor Ltd.,
                   7.250% Cv. Pfd. ..................      94,000      105,500
                                                      -----------  -----------
                 TELECOMMUNICATIONS -- 2.7%
       10,000    Cincinnati Bell Inc.,
                   6.750% Cv. Pfd.,
                   Ser. B ...........................     380,500      380,500
                                                      -----------  -----------
                 TOTAL CONVERTIBLE
                   PREFERRED STOCKS .................   2,752,066    2,960,145
                                                      -----------  -----------
                 TOTAL
                   INVESTMENTS -- 95.5% ............. $11,793,585   13,463,305
                                                      ===========
                 OTHER ASSETS AND
                   LIABILITIES (NET) -- 4.5% .....................     628,663
                                                                   -----------
                 NET ASSETS -- 100.0% ............................ $14,091,968
                                                                   ===========

                                                                   UNREALIZED
   PRINCIPAL                                        SETTLEMENT    APPRECIATION/
    AMOUNT                                             DATE      (DEPRECIATION)
   ---------                                       -----------   --------------
                 FORWARD FOREIGN EXCHANGE CONTRACTS -- 0.3%
$    (300,000)(c)Deliver Euros in
                   exchange for
                   USD 355,183 ...................... 01/06/06     $      (835)
     (250,000)(c)Deliver Euros in
                   exchange for
                   USD 296,208 ...................... 01/19/06            4,422
 (200,000,000)(b)Deliver Japanese Yen
                   in exchange for
                   USD 1,699,508 .................... 01/19/06          33,113
                                                                   -----------
                 TOTAL FORWARD FOREIGN EXCHANGE CONTRACTS ........ $    36,700
                                                                   ===========
- ----------------
(a) Security exempt from  registration  under Rule 144A of the Securities Act of
    1933,  as amended.  The security may be resold in  transactions  exempt from
    registration,  normally to qualified  institutional  buyers. At December 31,
    2005,  the market  value of the Rule 144A  security  amounted to $151,750 or
    1.08% of total net  assets.  The  security  has been  deemed by the Board of
    Directors to be a liquid security.
(b) Principal amount denoted in Japanese Yen.
(c) Principal  amount denoted in Euros.
(d) Principal amount denoted in British Pounds.

                                        % OF
                                       MARKET      MARKET
GEOGRAPHIC DIVERSIFICATION              VALUE      VALUE
- --------------------------            --------    --------
North America ........................   57.3%  $ 7,716,811
Japan ................................   24.9     3,351,829
Europe ...............................   11.0     1,485,898
Asia/Pacific .........................    6.8       908,767
                                        ------  -----------
                                        100.0%  $13,463,305
                                        ======  ===========

                 See accompanying notes to financial statements.

                                       6


                  THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND


STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2005
================================================================================

ASSETS:
  Investments, at value (cost $11,793,585) ....   $ 13,463,305
  Foreign currency, at value (cost $154,758) ..        153,538
  Cash ........................................         37,612
  Receivable for investments sold .............        246,992
  Receivable for Fund shares sold .............        151,767
  Dividends and interest receivable ...........         82,988
  Unrealized appreciation on forward
     foreign exchange contracts ...............         36,700
  Other assets ................................          1,774
                                                  ------------
  TOTAL ASSETS ................................     14,174,676
                                                  ------------
LIABILITIES:
  Payable for Fund shares redeemed ............         27,190
  Payable for shareholder
     communications expenses ..................         19,805
  Payable for audit and legal fees ............         14,777
  Payable for investment advisory fees ........         10,368
  Payable for shareholder services fees .......          4,657
  Payable for distribution fees ...............          3,092
  Other accrued expenses ......................          2,819
                                                  ------------
  TOTAL LIABILITIES ...........................         82,708
                                                  ------------
  NET ASSETS applicable to 2,266,245
    shares outstanding ........................   $ 14,091,968
                                                  ============
NET ASSETS CONSIST OF:
  Capital stock, each class at $0.001 par value   $      2,266
  Additional paid-in capital ..................     12,435,863
  Accumulated distributions in excess
    of net investment income ..................        (50,030)
  Net unrealized appreciation on investments ..      1,669,720
  Net unrealized appreciation on foreign
    currency translations .....................         34,149
                                                  ------------
  NET ASSETS ..................................   $ 14,091,968
                                                  ============
SHARES OF CAPITAL STOCK:
  CLASS AAA:
  Net Asset Value, offering and redemption
    price per share ($13,780,609 / 2,214,702
    shares outstanding; 75,000,000
    shares authorized) ........................          $6.22
                                                         =====
  CLASS A:
  Net Asset Value and redemption price per share
    ($92,975 / 14,931 shares outstanding;
    50,000,000 shares authorized) .............          $6.23
                                                         =====
  Maximum offering price per share (NAV / 0.9425,
    based on maximum sales charge
    of 5.75% of the offering price) ...........          $6.61
                                                         =====
  CLASS B:
  Net Asset Value and offering price per share
    ($72,888 / 12,335 shares outstanding;
    25,000,000 shares authorized) .............          $5.91(a)
                                                         =====
  CLASS C:
  Net Asset Value and offering price per share
    ($145,496 / 24,277 shares outstanding;
    25,000,000 shares authorized) .............          $5.99(a)
                                                         =====
- ----------------
(a) Redemption price varies based on length of time held.


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2005
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $1,558) .........   $   211,757
  Interest ...........................................       237,350
                                                         -----------
  TOTAL INVESTMENT INCOME ............................       449,107
                                                         -----------
EXPENSES:
  Investment advisory fees ...........................       168,523
  Distribution fees - Class AAA ......................        40,487
  Distribution fees - Class A ........................         1,028
  Distribution fees - Class B ........................           935
  Distribution fees - Class C ........................         1,529
  Shareholder communications expenses ................        39,042
  Legal and audit fees ...............................        30,211
  Registration fees ..................................        23,885
  Shareholder services fees ..........................        20,146
  Custodian fees .....................................        11,645
  Interest expense ...................................         5,018
  Directors' fees ....................................         2,024
  Miscellaneous expenses .............................        12,310
                                                         -----------
  TOTAL EXPENSES .....................................       356,783
  Less:
  Expense reimbursement (see Note 3) .................       (11,992)
  Custodian fees credits .............................          (879)
                                                         -----------
  NET EXPENSES .......................................       343,912
                                                         -----------
  NET INVESTMENT INCOME ..............................       105,195
                                                         -----------
NET REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS AND FOREIGN CURRENCY:
  Net realized gain on investments ...................     1,310,722
  Net realized gain on foreign
    currency transactions ............................       226,015
  Net change in unrealized appreciation/
    depreciation on investments and
    foreign currency translations ....................      (906,265)
                                                         -----------
  NET REALIZED AND UNREALIZED GAIN (LOSS) ON
     INVESTMENTS AND FOREIGN CURRENCY ................       630,472
                                                         -----------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS   $   735,667
                                                         ===========

                 See accompanying notes to financial statements.

                                       7


                  THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND


STATEMENT OF CHANGES IN NET ASSETS
================================================================================



                                                                          YEAR ENDED        YEAR ENDED
                                                                       DECEMBER 31, 2005 DECEMBER 31, 2004
                                                                       ----------------- -----------------
                                                                                     
OPERATIONS:
  Net investment income ...............................................   $    105,195     $    194,040
  Net realized gain on investments and
    foreign currency transactions .....................................      1,536,737        1,239,372
  Net change in unrealized appreciation/
    depreciation on investments and foreign
    currency translations .............................................       (906,265)         628,898
                                                                          ------------     ------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS ................        735,667        2,062,310
                                                                          ------------     ------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income
    Class AAA .........................................................       (558,053)        (329,698)
    Class A ...........................................................        (15,235)          (4,835)
    Class B ...........................................................         (3,509)          (2,170)
    Class C ...........................................................         (3,372)          (1,316)
                                                                          ------------     ------------
                                                                              (580,169)        (338,019)
                                                                          ------------     ------------
  Net realized gains
    Class AAA .........................................................     (1,034,911)      (1,071,095)
    Class A ...........................................................        (28,253)         (15,708)
    Class B ...........................................................         (6,508)          (7,049)
    Class C ...........................................................         (6,254)          (4,276)
                                                                          ------------     ------------
                                                                            (1,075,926)      (1,098,128)
                                                                          ------------     ------------
  Return of Capital
    Class AAA .........................................................           --         (1,990,268)
    Class A ...........................................................           --            (29,187)
    Class B ...........................................................           --            (13,098)
    Class C ...........................................................           --             (7,945)
                                                                          ------------     ------------
                                                                                  --         (2,040,498)
                                                                          ------------     ------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS .................................     (1,656,095)      (3,476,645)
                                                                          ------------     ------------
CAPITAL SHARE TRANSACTIONS:
    Class AAA .........................................................     (5,708,864)       4,461,404
    Class A ...........................................................       (469,690)         516,340
    Class B ...........................................................        (52,160)          75,271
    Class C ...........................................................         42,083           59,788
                                                                          ------------     ------------
  NET INCREASE (DECREASE) IN NET ASSETS FROM CAPITAL SHARE TRANSACTIONS     (6,188,631)       5,112,803
                                                                          ------------     ------------
  REDEMPTION FEES .....................................................         25,134            3,506
                                                                          ------------     ------------
  NET INCREASE (DECREASE) IN NET ASSETS ...............................     (7,083,925)       3,701,974
NET ASSETS:
  Beginning of period .................................................     21,175,893       17,473,919
                                                                          ------------     ------------
  End of period (including undistributed net investment
    income of $0 and $0, respectively) ................................   $ 14,091,968     $ 21,175,893
                                                                          ============     ============

                 See accompanying notes to financial statements.

                                       8


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS
================================================================================


1.  ORGANIZATION.  The GAMCO Global  Convertible  Securities  Fund (the "Fund"),
formerly,  The Gabelli  Global  Convertible  Securities  Fund, a series of GAMCO
Global Series Funds, Inc. (the "Corporation"),  formerly,  Gabelli Global Series
Funds, Inc., was organized on July 16, 1993 as a Maryland corporation.  The Fund
is a non-diversified open-end management investment company registered under the
Investment  Company Act of 1940,  as amended (the "1940  Act"),  and one of four
separately   managed   portfolios   (collectively,   the  "Portfolios")  of  the
Corporation.  The Fund's  primary  objective  is to obtain a high level of total
return  through a  combination  of income  and  capital  appreciation.  The Fund
commenced investment operations on February 3, 1994.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance  with  U.S.  generally  accepted   accounting   principles   requires
management to make estimates and  assumptions  that affect the reported  amounts
and  disclosures in the financial  statements.  Actual results could differ from
those estimates.  The following is a summary of significant  accounting policies
followed by the Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange or traded in the U.S. over-the-counter market for
which market quotations are readily available are valued at the last quoted sale
price or a market's  official  closing  price as of the close of business on the
day the  securities  are being  valued.  If there  were no sales  that day,  the
security is valued at the  average of the  closing  bid and asked  prices or, if
there were no asked  prices  quoted on that day,  then the security is valued at
the closing bid price on that day. If no bid or asked  prices are quoted on such
day,  the  security is valued at the most  recently  available  price or, if the
Board of  Directors  (the  "Board") so  determines,  by such other method as the
Board shall determine in good faith, to reflect its fair market value. Portfolio
securities  traded on more than one national  securities  exchange or market are
valued according to the broadest and most  representative  market, as determined
by Gabelli Funds, LLC (the "Adviser").

Portfolio securities primarily traded on foreign markets are generally valued at
the preceding closing values of such securities on their respective exchanges or
if after the close of the foreign markets, but prior to the close of business on
the day the securities are being valued, market conditions change significantly,
certain foreign securities may be fair valued pursuant to procedures established
by the Board. Debt instruments with remaining maturities of 60 days or less that
are not  credit  impaired  are  valued  at  amortized  cost,  unless  the  Board
determines  such amount does not reflect the  securities'  fair value,  in which
case these  securities  will be valued at their fair value as  determined by the
Board. Debt instruments  having a maturity greater than 60 days for which market
quotations are readily available are valued at the average of the latest bid and
asked prices.  If there were no asked prices quoted on such day, the security is
valued using the closing bid price.  Futures contracts are valued at the closing
settlement  price of the  exchange  or board  of trade on which  the  applicable
contract is traded.

Securities and assets for which market  quotations are not readily available are
valued  at their  fair  value  as  determined  in good  faith  under  procedures
established by and under the general  supervision  of the Board.  Fair valuation
methodologies  and procedures may include,  but are not limited to: analysis and
review of available  financial and non-financial  information about the company;
comparisons  to the  valuation  and changes in valuation of similar  securities,
including a comparison of foreign securities to the equivalent U.S. dollar value
ADR  securities at the close of the U.S.  exchange;  and evaluation of any other
information that could be indicative of the value of the security.

                                       9


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit  guidelines  established  by the  Adviser  and  reviewed by the
Board.  Under  the  terms of a  typical  repurchase  agreement,  the Fund  takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2005, there were no open repurchase agreements.

FUTURES  CONTRACTS.  The Fund may engage in futures contracts for the purpose of
hedging  against  changes in the value of its  portfolio  securities  and in the
value of  securities  it  intends  to  purchase.  Upon  entering  into a futures
contract,  the Fund is required to deposit  with the broker an amount of cash or
cash equivalents equal to a certain  percentage of the contract amount.  This is
known as the "initial margin". Subsequent payments ("variation margin") are made
or  received by the Fund each day,  depending  on the daily  fluctuation  of the
value of the  contract.  The daily  changes  in the  contract  are  included  in
unrealized gains or losses. The Fund recognizes a realized gain or loss when the
contract is closed.

There are several  risks in  connection  with the use of futures  contracts as a
hedging  instrument.   The  change  in  value  of  futures  contracts  primarily
corresponds  with the  value  of their  underlying  instruments,  which  may not
correlate with the change in value of the hedged investments. In addition, there
is the risk that the Fund may not be able to enter  into a  closing  transaction
because of an illiquid  secondary  market.  At December 31, 2005,  there were no
open futures contracts.

FORWARD  FOREIGN  EXCHANGE  CONTRACTS.  The Fund may engage in  forward  foreign
exchange contracts for hedging a specific transaction with respect to either the
currency in which the  transaction is denominated or another  currency as deemed
appropriate by the Adviser. Forward foreign exchange contracts are valued at the
forward  rate and are  marked-to-market  daily.  The  change in market  value is
included in  unrealized  appreciation/depreciation  on  investments  and foreign
currency translations.  When the contract is closed, the Fund records a realized
gain or loss equal to the  difference  between the value of the  contract at the
time it was opened and the value at the time it was closed.

The use of forward foreign exchange contracts does not eliminate fluctuations in
the underlying prices of the Fund's portfolio securities,  but it does establish
a rate of exchange that can be achieved in the future.  Although forward foreign
exchange  contracts  limit the risk of loss due to a decline in the value of the
hedged currency, they also limit any potential gain that might result should the
value of the currency increase. In addition,  the Fund could be exposed to risks
if the  counterparties  to the  contracts  are unable to meet the terms of their
contracts.  Forward  foreign  exchange  contracts  at  December  31,  2005,  are
reflected in the Schedule of Investments.

                                       10


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================


FOREIGN CURRENCY TRANSLATIONS.  The books and records of the Fund are maintained
in United States (U.S.)  dollars.  Foreign  currencies,  investments,  and other
assets and liabilities are translated into U.S.  dollars at the current exchange
rates.  Purchases and sales of investment  securities,  income, and expenses are
translated  at the exchange  rate  prevailing  on the  respective  dates of such
transactions.  Unrealized  gains and losses that result from  changes in foreign
exchange rates and/or changes in market prices of securities  have been included
in unrealized  appreciation/depreciation  on  investments  and foreign  currency
translations.  Net realized  foreign  currency  gains and losses  resulting from
changes in exchange  rates include  foreign  currency  gains and losses  between
trade date and settlement date on investment  securities  transactions,  foreign
currency  transactions,  and the difference  between the amounts of interest and
dividends  recorded on the books of the Fund and the amounts actually  received.
The  portion of foreign  currency  gains and losses  related to  fluctuation  in
exchange rates between the initial trade date and subsequent  sale trade date is
included in realized gain/(loss) on investments.

FOREIGN  SECURITIES.  The Fund  may  directly  purchase  securities  of  foreign
issuers.  Investing in securities of foreign issuers  involves special risks not
typically  associated  with investing in securities of U.S.  issuers.  The risks
include  possible  revaluation of currencies,  the ability to repatriate  funds,
less complete financial information about companies, and possible future adverse
political  and  economic  developments.  Moreover,  securities  of many  foreign
issuers and their markets may be less liquid and their prices more volatile than
those of securities of comparable U.S. issuers.

FOREIGN  TAXES.  The Fund may be subject to  foreign  taxes on income,  gains on
investments or currency repatriation, a portion of which may be recoverable. The
Fund will accrue such taxes and recoveries as applicable, based upon its current
interpretation  of tax rules and regulations  that exist in the markets in which
it invests.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium and  accretion  of discount) is recorded on the accrual
basis.  Premiums  and  discounts  on debt  securities  are  amortized  using the
effective  yield to maturity  method.  Premiums and discounts on debt securities
are amortized using the yield to maturity method. Dividend income is recorded on
the ex-dividend date except for certain  dividends which are recorded as soon as
the Fund is informed of the dividend.

DETERMINATION   OF  NET  ASSET  VALUE  AND  CALCULATION  OF  EXPENSES.   Certain
administrative  expenses are common to, and allocated among,  various affiliated
funds.  Such allocations are made on the basis of each Fund's average net assets
or other criteria  directly  affecting the expenses as determined by the Adviser
pursuant to procedures established by the Board.

In calculating  the net asset value ("NAV") per share of each class,  investment
income, realized and unrealized gains and losses,  redemption fees, and expenses
other than class specific expenses,  are allocated daily to each class of shares
based upon the  proportion  of net assets of each class at the beginning of each
day. Distribution expenses are borne solely by the class incurring the expense.

CUSTODIAN FEE CREDITS. When cash balances are maintained in the custody account,
the Fund receives  credits which are used to offset  custodian  fees.  The gross
expenses paid under the custody  arrangement  are included in custodian  fees in
the  Statement of  Operations  with the  corresponding  expense  offset shown as
"custodian fee credits".

                                       11


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================


DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders are recorded on the ex-dividend date. Distributions to shareholders
are based on income and capital gains as  determined in accordance  with Federal
income tax  regulations,  which may differ  from  income  and  capital  gains as
determined  under  U.S.  generally   accepted   accounting   principles.   These
differences  are  primarily  due to differing  treatments of income and gains on
various  investment  securities and foreign  currency  transactions  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund. Distributions from net investment income include net realized gains
on  foreign  currency  transactions.  Distributions  made in excess  of  current
earnings  and  profits  on a tax basis are  treated as a  non-taxable  return of
capital. These book/tax differences are either temporary or permanent in nature.
To the extent  these  differences  are  permanent,  adjustments  are made to the
appropriate  equity  accounts in the period when the  differences  arise.  These
reclassifications  have no impact on the NAV of the Fund and the  calculation of
net  investment  income per share in the  Financial  Highlights  excludes  these
adjustments.  For the year ended December 31, 2005,  reclassifications were made
to decrease  accumulated  distributions  in excess of net  investment  income by
$428,553  and to increase  accumulated  net  realized  gain on  investments  and
foreign  currency  transactions  by $56,132,  with an  offsetting  adjustment to
additional paid-in capital.

The tax character of  distributions  paid during the fiscal year ended  December
31, 2005 and December 31, 2004 was as follows:

                                             YEAR ENDED         YEAR ENDED
                                          DECEMBER 31, 2005  DECEMBER 31, 2004
                                          -----------------  -----------------
        DISTRIBUTIONS PAID FROM:
        Ordinary income (inclusive of
          short-term capital gains) ........ $1,232,664          $1,436,147
        Long-term gains ....................    423,431                  --
        Non taxable return of capital ......         --           2,040,498
                                             ----------          ----------
        Total distributions paid ........... $1,656,095          $3,476,645
                                             ==========          ==========

The Fund has a fixed  distribution  policy.  Under the policy, the Fund declares
and pays distributions quarterly and identifies that portion of the distribution
from net investment  income,  capital  gains,  and  paid-in-capital.  The actual
source of the distribution is determined after the end of the year.  Pursuant to
this  policy,  distributions  during  the year were  made in excess of  required
distributions.  Such  distributions  were made from current earnings and profits
and  were  considered  ordinary  income.  The Fund  continues  to  evaluate  its
distribution  policy in light of ongoing economic and market  conditions and may
change the amount of the quarterly  distributions in the future.  For the period
from January 2000 through April 2005, the Fund paid $0.10 per share on a monthly
basis. On May 20, 2005, the Board announced a change in the distribution policy.
The Fund currently intends to pay $0.03 per share on a quarterly basis in March,
June, September, and December.

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended (the  "Code").  It is the policy of the Fund to comply with the
requirements  of the Code  applicable to regulated  investment  companies and to
distribute  substantially  all of its net investment  company taxable income and
net capital gains. Therefore, no provision for Federal income taxes is required.

                                       12


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================


As of December 31, 2005,  the components  of accumulated  earnings/(losses) on a
tax basis were as follows:

                  Net unrealized appreciation on investments,
                      foreign receivables and payables ........... $1,669,720
                  Other temporary differences ....................    (15,881)
                                                                   ----------
                  Total accumulated gain ......................... $1,653,839
                                                                   ==========

For the year ended  December  31,  2005,  the Fund  utilized  net  capital  loss
carryforwards of $502,405.

The following  summarizes  the tax cost of  investments  and related  unrealized
appreciation/depreciation at December 31, 2005:

                                         GROSS         GROSS      NET UNREALIZED
                                      UNREALIZED    UNREALIZED     APPRECIATION/
                             COST    APPRECIATION  DEPRECIATION   (DEPRECIATION)
                             ----    ------------  ------------   --------------
      Investments ...... $11,793,585   $1,977,878    $(308,158)     $1,669,720

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the  value of its  average  daily net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business and affairs,  and pays the  compensation  of all
Officers and  Directors of the Fund who are  affiliated  persons of the Adviser.
The  Adviser has  voluntarily  agreed to  reimburse  expenses of the Fund to the
extent  necessary  to  maintain  the  annualized  total net  operating  expenses
(exclusive of interest  expense) of 2.00%,  2.00%,  2.75%,  and 2.75% of average
daily net assets for Class AAA, Class A, Class B, and Class C, respectively. For
the year ended December 31, 2005, the Adviser  reimbursed the Fund in the amount
of $11,992. Such amount is not recoverable in future fiscal years.

4.  DISTRIBUTION  PLAN.  The Fund's Board has adopted a  distribution  plan (the
"Plan")  for each class of shares  pursuant  to Rule  12b-1  under the 1940 Act.
Gabelli & Company,  Inc.  ("Gabelli &  Company"),  an  affiliate of the Adviser,
serves as  distributor  of the Fund.  Under the Class AAA, Class A, Class B, and
Class C Share  Plans,  payments  are  authorized  to Gabelli & Company at annual
rates of 0.25%, 0.25%, 1.00%, and 1.00%, respectively,  of the average daily net
assets of those classes,  the annual  limitations under each Plan. Such payments
are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2005, other than short-term  securities,  aggregated
$9,668,051 and $17,743,881, respectively.

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2005, the
Fund paid  brokerage  commissions  of $125 to Gabelli &  Company.  Additionally,
Gabelli & Company  informed  the Fund that it  received  $1,951  from  investors
representing  commissions  (sales  charges and  underwriting  fees) on sales and
redemptions of Fund shares.

                                       13


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================


7. LINE OF  CREDIT. The Fund has access to an unsecured  line of credit of up to
$25,000,000  from the  custodian for temporary  borrowing  purposes.  Borrowings
under this  arrangement  bear  interest at 0.75% above the Federal Funds rate on
outstanding  balances. At December 31, 2005, there were no borrowing outstanding
from the line of credit.

The  average  daily  amount of  borrowings  outstanding  from the line of credit
within the year ended  December  31, 2005 was $124,418  with a weighted  average
interest rate of 3.83%.  The maximum amount borrowed at any time during the year
ended December 31, 2005 was $1,920,000.

8. CAPITAL STOCK TRANSACTIONS.  The Fund currently offers four classes of shares
- -- Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares. Class
AAA Shares are offered only to investors  who acquire them directly from Gabelli
& Company or through  selected  broker/dealers  without a sales charge.  Class A
Shares are subject to a maximum front-end sales charge of 5.75%.  Class B Shares
are subject to a contingent  deferred  sales  charge  ("CDSC")  upon  redemption
within  six  years  of  purchase  and  automatically  convert  to Class A Shares
approximately  eight years after the original  purchase.  The applicable CDSC is
equal to a declining  percentage  of the lesser of the NAV per share at the date
of the original  purchase or at the date of  redemption,  based on the length of
time held.  Class C Shares are subject to a 1% CDSC for one year after purchase.
Class B Shares are  available  only through  exchange of Class B Shares of other
funds  distributed  by Gabelli & Company.  The Board has approved Class I Shares
which have not been offered publicly.

Effective June 15, 2005, the Fund imposed a redemption fee of 2.00% on Class AAA
Shares,  Class A Shares, Class B Shares, and Class C Shares that are redeemed or
exchanged  on or before the seventh day after the date of a purchase.  (Prior to
June 15, 2005, the Fund imposed a redemption fee on shares that were redeemed or
exchanged  within the sixtieth day after the date of a purchase.) The redemption
fee  is  deducted  from  the  proceeds   otherwise   payable  to  the  redeeming
shareholders  and is retained by the Fund. The  redemption  fees retained by the
Fund during the years ended  December 31, 2005 and December 31, 2004 amounted to
$25,134 and $3,506, respectively.

The redemption fee does not apply to shares purchased  through programs that the
Adviser  determined to have  appropriate  short-term  trading policies in place.
Additionally,  certain recordkeepers for qualified and non-qualified  retirement
plans that could not collect the redemption fee at the participant  level due to
systems limitations have received an extension to implement such systems.

                                       14


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================


Transactions in shares of capital stock were as follows:



                                                              YEAR ENDED                        YEAR ENDED
                                                           DECEMBER 31, 2005                 DECEMBER 31, 2004
                                                     ----------------------------      ---------------------------
                                                       SHARES          AMOUNT            SHARES         AMOUNT
                                                     ----------      ------------      ----------      -----------
                                                               CLASS AAA                         CLASS AAA
                                                     ----------------------------      ---------------------------
                                                                                           
Shares sold ........................................  1,258,482      $  7,437,867       1,621,450      $10,337,026
Shares issued upon reinvestment of dividends .......    232,662         1,356,751         482,014        3,037,994
Shares redeemed .................................... (2,527,933)      (14,503,482)     (1,404,805)      (8,913,616)
                                                     ----------      ------------      ----------      -----------
  Net increase (decrease) .......................... (1,036,789)     $ (5,708,864)        698,659      $ 4,461,404
                                                     ==========      ============      ==========      ===========
                                                                CLASS A                           CLASS A
                                                     ----------------------------      ---------------------------
Shares sold ........................................     14,762      $     84,309          87,249      $   546,490
Shares issued upon reinvestment of dividends .......      2,003            11,680           3,755           23,269
Shares redeemed ....................................    (97,283)         (565,679)         (8,221)         (53,419)
                                                     ----------      ------------      ----------      -----------
  Net increase (decrease) ..........................    (80,518)     $   (469,690)         82,783      $   516,340
                                                     ==========      ============      ==========      ===========
                                                                CLASS B                           CLASS B
                                                     ----------------------------      ---------------------------
Shares sold ........................................         --                --          10,388      $    66,681
Shares issued upon reinvestment of dividends .......        636      $      3,542           1,567            9,539
Shares redeemed ....................................    (10,395)          (55,702)           (159)            (949)
                                                     ----------      ------------      ----------      -----------
  Net increase (decrease) ..........................     (9,759)     $    (52,160)         11,796      $    75,271
                                                     ==========      ============      ==========      ===========
                                                                CLASS C                           CLASS C
                                                     ----------------------------      ---------------------------
Shares sold ........................................     23,314      $    125,405           9,896      $    61,575
Shares issued upon reinvestment of dividends .......      1,090             6,137           1,486            9,073
Shares redeemed ....................................    (15,698)          (89,459)         (1,689)         (10,860)
                                                     ----------      ------------      ----------      -----------
  Net increase .....................................      8,706      $     42,083           9,693      $    59,788
                                                     ==========      ============      ==========      ===========


9.  INDEMNIFICATIONS.  The Fund enters into  contracts that contain a variety of
indemnifications.  The Fund's  maximum  exposure  under  these  arrangements  is
unknown.  However, the Fund has not had prior claims or losses pursuant to these
contracts and expects the risk of loss to be remote.

10. OTHER MATTERS.  The Adviser and/or  affiliates have received  subpoenas from
the Attorney  General of the State of New York and the  Securities  and Exchange
Commission (the "SEC")  requesting  information on mutual fund trading practices
involving  certain  funds managed by the Adviser.  GAMCO  Investors,  Inc.,  the
Adviser's  parent  company,  is responding  to these  requests for documents and
testimony.  On a separate matter, in September 2005, the Adviser was informed by
the staff of the SEC that the  staff may  recommend  to the  Commission  that an
administrative  remedy and a  monetary  penalty  be sought  from the  Adviser in
connection  with the  actions of two of seven  closed-end  funds  managed by the
Adviser  relating  to  Section  19(a)  and Rule  19a-1 of the  1940  Act.  These
provisions require registered investment companies to provide written statements
to shareholders  when a dividend is made from a source other than net investment
income. While the two closed-end funds sent annual statements and provided other
materials containing this information, the funds did not send written statements
to shareholders  with each  distribution in 2002 and 2003. The Adviser  believes
that all of the funds are now in  compliance.  The Adviser  believes  that these
matters would have no effect on the Fund or any material  adverse  effect on the
Adviser or its ability to manage the Fund.

                                       15


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
FINANCIAL HIGHLIGHTS
================================================================================


Selected data for a share of capital stock outstanding throughout each period:


                            INCOME FROM INVESTMENT OPERATIONS                    DISTRIBUTIONS
                          -------------------------------------    -----------------------------------------------
                                          Net
              Net Asset       Net     Realized and      Total                    Net
   Period       Value,    Investment   Unrealized       from         Net      Realized     Return
   Ended      Beginning     Income   Gain (Loss) on  Investment   Investment   Gain on       of         Total
December 31,  of Period    (Loss)(g)   Investments   Operations     Income   Investments   Capital   Distributions
- ------------  ---------    --------    -----------   ----------     ------   -----------   -------   -------------
                                                                               
CLASS AAA
  2005         $ 6.26       $ 0.04       $ 0.40       $ 0.44        $(0.17)    $(0.32)         --      $(0.49)
  2004           6.77         0.07         0.62         0.69         (0.12)     (0.38)     $(0.70)      (1.20)
  2003           6.66         0.07         1.24         1.31         (0.11)        --       (1.09)      (1.20)
  2002           8.29         0.07        (0.50)       (0.43)        (0.04)        --       (1.16)      (1.20)
  2001          10.86        (0.09)       (1.28)       (1.37)           --      (0.00)(d)   (1.20)      (1.20)
CLASS A
  2005         $ 6.26       $ 0.04       $ 0.41       $ 0.45        $(0.17)    $(0.32)         --      $(0.49)
  2004           6.77         0.09         0.60         0.69         (0.11)     (0.36)     $(0.73)      (1.20)
  2003           6.66         0.07         1.24         1.31         (0.11)        --       (1.09)      (1.20)
  2002           8.28         0.07        (0.49)       (0.42)        (0.04)        --       (1.16)      (1.20)
  2001(b)       10.27        (0.09)       (1.10)       (1.19)           --      (0.00)(d)   (0.80)      (0.80)
CLASS B
  2005         $ 6.01       $(0.01)      $ 0.39       $ 0.38        $(0.17)    $(0.32)         --      $(0.49)
  2004           6.59         0.03         0.59         0.62         (0.10)     (0.34)     $(0.76)      (1.20)
  2003           6.55         0.03         1.21         1.24         (0.07)        --       (1.13)      (1.20)
  2002           8.23         0.02        (0.50)       (0.48)        (0.04)        --       (1.16)      (1.20)
  2001(a)       10.04        (0.16)       (0.75)       (0.91)           --       (0.00)(d)  (0.90)      (0.90)
CLASS C
  2005         $ 6.09       $ 0.00(d)    $ 0.38       $ 0.38        $(0.17)    $(0.32)         --      $(0.49)
  2004           6.66         0.03         0.60         0.63         (0.10)     (0.34)     $(0.76)      (1.20)
  2003           6.61         0.03         1.22         1.25         (0.07)        --       (1.13)      (1.20)
  2002           8.27         0.02        (0.48)       (0.46)        (0.04)        --       (1.16)      (1.20)
  2001(c)        8.58        (0.14)        0.03        (0.11)           --       (0.00)(d)  (0.20)      (0.20)




                                            RATIOS TO AVERAGE NET ASSETS/SUPPLEMENTAL DATA
                                    --------------------------------------------------------------------------

                         Net Asset            Net Assets    Net       Operating       Operating
   Period                  Value,               End of   Investment    Expenses        Expenses      Portfolio
   Ended      Redemption   End of    Total      Period     Income       Before          Net of        Turnover
December 31,    Fees(g)    Period   Return+   (in 000's)   (Loss)    Reimbursement  Reimbursement(e)    Rate
- ------------    -------    -------  -------   ----------   ------    -------------  ----------------  --------
                                                                               
CLASS AAA
  2005          $0.01       $6.22     8.0%      $13,781     0.63%         2.11%          2.03%(h)        58%
  2004           0.00(d)     6.26     11.7       20,350     1.06          2.06           2.01            60
  2003           0.00(d)     6.77     21.5       17,281     1.12          2.07           2.01            54
  2002             --        6.66     (4.9)       9,316     0.97          2.83           2.83            33
  2001             --        8.29    (13.2)       8,288    (0.93)         2.69           2.69            49
CLASS A
  2005          $0.01       $6.23      8.2%     $    93     0.68%         2.06%          2.04%(h)        58%
  2004           0.00(d)     6.26     11.6          598     1.41          2.06           2.01            60
  2003           0.00(d)     6.77     21.5           86     1.12          2.07           2.01            54
  2002             --        6.66     (4.7)           2     0.97          2.83           2.83            33
  2001(b)          --        8.28    (13.3)           9    (0.93)(f)      2.69(f)        2.69(f)         49
CLASS B
  2005          $0.01       $5.91      7.3%     $    73    (0.13)%        2.84%          2.78%(h)        58%
  2004           0.00(d)     6.01     10.8          133     0.45          2.81           2.76            60
  2003           0.00(d)     6.59     20.7           68     0.37          2.82           2.76            54
  2002             --        6.55     (5.6)          24     0.22          3.58           3.58            33
  2001(a)          --        8.23    (13.8)           6    (1.68)(f)      3.44(f)        3.44(f)         49
CLASS C
  2005          $0.01       $5.99      7.2%     $   145    (0.01)%        2.91%          2.78%(h)        58%
  2004           0.00(d)     6.09     10.9           95     0.44          2.81           2.76            60
  2003           0.00(d)     6.66     20.7           39     0.37          2.82           2.76            54
  2002             --        6.61     (5.3)          13     0.22          3.58           3.58            33
  2001(c)          --        8.27    (13.5)           0    (1.68)(f)      3.44(f)        3.44(f)         49

- --------------------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including  reinvestment  of  dividends  and does not reflect the  applicable
    sales  charges.  Total  return  for the  period of less than one year is not
    annualized.
(a) From March 28, 2001, the date Class B Shares were continuously outstanding.
(b) From May 2, 2001,  the date shares were  continuously  outstanding.  Class A
    Shares were  outstanding for the period March 13, 2000 through  November 30,
    2000.
(c) From  November  26,  2001,  the  date  Class  C  Shares  were   continuously
    outstanding.
(d) Amount represents less than $0.005 per share.
(e) The Fund incurred interest expense during the years ended December 31, 2005,
    2004, 2003,  2002, and 2001. If interest expense had not been incurred,  the
    ratios of  operating  expenses to average net assets  would have been 2.00%,
    2.00%,  2.00%, 2.82%, and 2.67% (Class AAA), 2.00%, 2.00%, 2.00%, 2.82%, and
    2.67% (Class A), 2.75%,  2.75%, 2.75%, 3.57%, and 3.42% (Class B) and 2.75%,
    2.75%, 2.75%, 3.57%, and 3.42% (Class C), respectively.
(f) Annualized.
(g) Per share amounts have been calculated using the average shares  outstanding
    method.
(h) The ratios do not include a reduction of expenses for  custodian fee credits
    on cash balances maintained with the custodian. Including such custodian fee
    credits,  the expense ratios for the year ended December 31, 2005 would have
    been 2.03% (Class  AAA),  2.03% (Class A), 2.78% (Class B), and 2.78% (Class
    C).

                 See accompanying notes to financial statements.

                                       16


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Directors of
GAMCO Global Series Funds, Inc.

We have audited the accompanying statement of assets and liabilities,  including
the schedule of  investments,  of The GAMCO Global  Convertible  Securities Fund
(the "Fund") (formerly The Gabelli Global Convertible Securities Fund), a series
of GAMCO Global Series Funds, Inc., (formerly Gabelli Global Series Funds, Inc.)
as of December 31, 2005,  and the related  statement of operations  for the year
then ended, the statements of changes in net assets for each of the two years in
the period then ended, and the financial  highlights for each of the three years
in the period then ended.  These financial  statements and financial  highlights
are the  responsibility  of the  Fund's  management.  Our  responsibility  is to
express an opinion on these financial  statements and financial highlights based
on our audits. The financial  highlights for each of the two years in the period
ended  December  31, 2002 were  audited by other  auditors  whose  report  dated
January  31,  2003,   expressed  an  unqualified   opinion  on  those  financial
highlights.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material  misstatement.  We were
not engaged to perform an audit of the Fund's  internal  control over  financial
reporting.  Our audits included consideration of internal control over financial
reporting as a basis for designing audit  procedures that are appropriate in the
circumstances,  but  not  for  the  purpose  of  expressing  an  opinion  on the
effectiveness  of  the  Fund's  internal   control  over  financial   reporting.
Accordingly,  we express no such opinion. An audit also includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements and financial  highlights,  assessing the accounting  principles used
and  significant  estimates  made by  management,  and  evaluating  the  overall
financial  statement  presentation.  Our  procedures  included  confirmation  of
securities  owned as of December 31,  2005,  by  correspondence  with the Fund's
custodian.  We  believe  that our  audits  provide  a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of The
GAMCO Global Convertible Securities Fund, a series of GAMCO Global Series Funds,
Inc.,  at December 31,  2005,  the results of its  operations  for the year then
ended,  the  changes  in its net  assets for each of the two years in the period
then  ended,  and the  financial  highlights  for each of the three years in the
period  then  ended,  in  conformity  with U.S.  generally  accepted  accounting
principles.

                                                           /s/ ERNST & YOUNG LLP

Philadelphia, Pennsylvania
February 14, 2006

                                       17


                  THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND

BOARD CONSIDERATION AND RE-APPROVAL OF INVESTMENT ADVISORY AGREEMENT (UNAUDITED)

During the six months ended  December  31,  2005,  the Board of Directors of the
Corporation  approved the continuation of the investment advisory agreement with
the Adviser  for the Fund on the basis of the  recommendation  by the  directors
(the "independent  directors") who are not "interested persons" of the Fund. The
following  paragraphs  summarize the material information and factors considered
by the  independent  directors  as well as their  conclusions  relative  to such
factors.

NATURE,  EXTENT AND QUALITY OF SERVICES.  The independent  directors  considered
information  regarding  the  portfolio  managers,  the depth of the analyst pool
available   to  the  Adviser   and  the   portfolio   managers,   the  scope  of
administrative,  shareholder,  and other services  supervised or provided by the
Adviser,  and the absence of significant service problems reported to the Board.
The  independent  directors  noted  the  experience,   length  of  service,  and
reputation of the portfolio managers.

INVESTMENT  PERFORMANCE.  The  independent  directors  reviewed  the  short  and
medium-term  performance  of the  Fund  against  a  peer  group  of  convertible
securities  funds,  noting  that the Fund's  performance  was in or near the top
third for the one and three year periods and in the bottom quartile for the five
year period.

PROFITABILITY.  The independent  directors  reviewed  summary data regarding the
lack of  profitability  of the Fund to the Adviser  both with an  administrative
overhead  charge and without  such a charge.  The  directors  also noted that an
affiliated broker of the Adviser received distribution fees and minor amounts of
sales commissions.

ECONOMIES OF SCALE.  The independent  directors  discussed the major elements of
the Adviser's cost structure and the relationship of those elements to potential
economies of scale and reviewed  rudimentary  data suggesting that 20% growth in
the Fund would not produce  meaningful  economies of scale that the shareholders
would not participate in.

SHARING  OF  ECONOMIES  OF  SCALE.  The  independent  directors  noted  that the
investment  advisory  fee  schedule  for the Fund does not take into account any
potential economies of scale that may develop.

SERVICE AND COST  COMPARISONS.  The independent  directors  compared the expense
ratios of the investment advisory fee, other expenses, and total expenses of the
Fund to similar expense ratios of the peer group of convertible securities funds
and  noted  that  the  Adviser's   advisory  fee  includes   substantially   all
administrative services of the Fund as well as investment advisory services. The
directors  noted  that  the  Fund's  expense  ratios  after  voluntary   expense
reimbursements were significantly  higher, and the Fund's size was significantly
lower, than average within this group. The directors also noted that all but one
of the  peer  group  were  domestic  convertible  funds,  thereby  limiting  the
usefulness of peer group comparisons. The directors also noted that the advisory
fee structure was the same as that in effect for most of the Gabelli funds.  The
directors  did not  compare  the  advisory  fee to the fee for  other  types  of
accounts managed by the Adviser.

CONCLUSIONS.  The independent  directors  concluded that the Fund enjoyed highly
experienced portfolio management services,  good ancillary services, and a mixed
performance  record.  The  independent  directors also concluded that the Fund's
expense  ratios  were   reasonable,   particularly  in  light  of  the  lack  of
profitability  to the Adviser of managing the Fund,  and that economies of scale
were not a significant  factor in their thinking at this time. The directors did
not view the potential  profitability of ancillary services as material to their
decision.  On the basis of the foregoing and without assigning particular weight
to any single  conclusion,  the  independent  directors  determined to recommend
continuation  of  the  investment  advisory  agreement  to  the  full  Board  of
Directors.

                                       18


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================


The business and affairs of the Company are managed  under the  direction of the
Company's  Board of  Directors.  Information  pertaining  to the  Directors  and
officers of the Company is set forth below.  The Fund's  Statement of Additional
Information  includes additional  information about The GAMCO Global Convertible
Securities Fund's Directors and is available,  without charge,  upon request, by
calling 800-GABELLI (800-422-3554) or by writing to The GAMCO Global Convertible
Securities Fund at One Corporate Center, Rye, NY 10580-1422.



                         TERM OF        NUMBER OF
                       OFFICE AND     FUNDS IN FUND
NAME, POSITION(S)       LENGTH OF        COMPLEX
    ADDRESS 1              TIME         OVERSEEN BY       PRINCIPAL OCCUPATION(S)              OTHER DIRECTORSHIPS
    AND AGE              SERVED 2        DIRECTOR         DURING PAST FIVE YEARS                HELD BY DIRECTOR 4
- ----------------         --------       ----------        ----------------------                ------------------
                                                                                     
INTERESTED DIRECTORS 3:
- ----------------------

MARIO J. GABELLI       Since 1993          24     Chairman of the Board and Chief Executive      Director of Morgan Group
Director and                                      Officer of GAMCO Investors, Inc.               Holdings, Inc.
Chief Investment Officer                          and Chief Investment Officer - Value           (holding company)
Age: 63                                           Portfolios of Gabelli Funds, LLC and
                                                  GAMCO Asset Management Inc.; Chairman
                                                  and Chief Executive Officer of Lynch
                                                  Interactive Corporation (multimedia
                                                  and services)

JOHN D. GABELLI        Since 1993          10     Senior Vice President of Gabelli &             Director of GAMCO
Director                                          Company, Inc.                                  Investors, Inc.
Age: 61

NON-INTERESTED DIRECTORS:
- ------------------------

E. VAL  CERUTTI        Since 2001           7     Chief Executive Officer of Cerutti             Director of Lynch Corporation
Director                                          Consultants, Inc.; Adviser, Iona College       (diversified
Age: 66                                           School of Business                             manufacturing)


ANTHONY J. COLAVITA    Since 1993          34     Partner in the law firm of                       --
Director                                          Anthony J. Colavita, P.C.
Age: 70

ARTHUR V. FERRARA      Since 2001           6     Formerly, Chairman of the Board and Chief      Director/Trustee of
Director                                          Executive Officer of The Guardian Life         25 mutual funds within the
Age: 75                                           Insurance Company of America from January      Guardian Fund Complex
                                                  1993 to December 1995; President, Chief
                                                  Executive Officer and a Director
                                                  prior thereto

WERNER J. ROEDER, MD   Since 1993          23     Medical Director of Lawrence                     --
Director                                          Hospital and practicing private physician
Age: 65

ANTHONIE C. VAN EKRIS  Since 1993          18     Chairman of BALMAC International, Inc.           --
Director                                          and futures trading)
Age: 71

SALVATORE J. ZIZZA     Since 2004          25     Chairman of Hallmark Electrical                Director of Hollis-Eden
Director                                          Supplies Corp.                                 Pharmaceuticals
Age: 60                                                                                          (biotechnology);
                                                                                                 Director of Earl
                                                                                                 Scheib, Inc.
                                                                                                 (automotive services)

                                          19


THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
ADDITIONAL FUND INFORMATION (UNAUDITED) (CONTINUED)
================================================================================




                         TERM OF
                       OFFICE AND
NAME, POSITION(S)       LENGTH OF
    ADDRESS 1              TIME              PRINCIPAL OCCUPATION(S)
    AND AGE              SERVED 2            DURING PAST FIVE YEARS
- ----------------         --------            ----------------------
                                         


OFFICERS:

BRUCE N. ALPERT        Since 2003             Executive Vice President and Chief Operating
President and Treasurer                       Officer of Gabelli Funds, LLC since 1988 and
Age: 54                                       an officer of all of the registered investment
                                              companies in the Gabelli Funds complex.
                                              Director and President of Gabelli Advisers, Inc.
                                              since 1998.

JAMES E. MCKEE         Since 1995             Vice President, General Counsel and Secretary of
Secretary                                     GAMCO Investors, Inc. since 1999 and GAMCO
Age: 42                                       Asset Management Inc. since 1993; Secretary of
                                              all of the registered investment companies in
                                              the Gabelli Funds complex.

PETER D. GOLDSTEIN     Since 2004             Director of Regulatory Affairs for GAMCO Investors, Inc.
Chief Compliance Officer                      since 2004; Chief Compliance Officer of all of the
Age: 52                                       registered investment companies in the Gabelli Funds
                                              complex; Vice President of Goldman Sachs Asset
                                              Management from 2000 through 2004.


- ---------------------------
 1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
 2 Each Director  will hold office for an indefinite  term until the earliest of
   (i) the next  meeting of  shareholders,  if any,  called  for the  purpose of
   considering  the  election  or  re-election  of such  Director  and until the
   election and  qualification of his or her successor,  if any, elected at such
   meeting,  or (ii) the date a Director  resigns or  retires,  or a Director is
   removed by the Board of Directors or  shareholders,  in  accordance  with the
   Company's  By-Laws and  Articles of  Incorporation.  Each  officer  will hold
   office for an indefinite  term until the date he or she resigns or retires or
   until his or her successor is elected and qualified.  Effective  November 16,
   2005, Mr. Karl Otto Pohl resigned from the Board  of Directors and now serves
   as Director Emeritus.
 3 "Interested  person" of the Company as defined in the Investment  Company Act
   of 1940. Messrs. M. Gabelli and J. Gabelli are each considered an "interested
   person" because of their  affiliation  with Gabelli Funds,  LLC which acts as
   the Company's  investment  adviser.  Mario J. Gabelli and John D. Gabelli are
   brothers.
 4 This column includes only  directorships  of companies  required to report to
   the SEC under the Securities  Exchange Act of 1934 (i.e. public companies) or
   other investment companies registered under the 1940 Act.


- --------------------------------------------------------------------------------
                   2005 TAX NOTICE TO SHAREHOLDERS (Unaudited)

  For the fiscal year ended December 31, 2005, the Fund paid to  shareholders an
  ordinary  income dividend  (comprised of net investment  income and short-term
  capital gains) totaling $0.36, $0.36, $0.36, and $0.36 and a long-term capital
  gain distribution  totaling $0.13, $0.13, $0.13, and $0.13 per share for Class
  AAA, Class A, Class B, and Class C Shares, respectively. The Fund designates a
  maximum of $943,591 of long-term  capital as a capital  gain  dividend for tax
  reporting purposes. For the fiscal year ended December 31, 2005, 21.40% of the
  ordinary  income  dividend  qualifies  for  the  dividend  received  deduction
  available to corporations,  and 15.46% of the ordinary income distribution was
  qualified dividend income.

  U.S. GOVERNMENT INCOME

  The percentage of the ordinary  income dividend paid by the Fund during fiscal
  year 2005 which was derived  from U.S.  Treasury  securities  was 0.41%.  Such
  income is exempt from state and local tax in all states. However, many states,
  including New York and California,  allow a tax exemption for a portion of the
  income earned only if a mutual fund has invested at least 50% of its assets at
  the  end of  each  quarter  of the  Fund's  fiscal  year  in  U.S.  Government
  securities.  The GAMCO Global  Convertible  Securities  Fund did not meet this
  strict  requirement  in 2005. Due to the diversity in state and local tax law,
  it is  recommended  that you  consult  your  personal  tax  advisor  as to the
  applicability of the information provided to your specific situation.
- --------------------------------------------------------------------------------

                                          20


- --------------------------------------------------------------------------------
     GABELLI FUNDS AND YOUR PERSONAL PRIVACY
================================================================================

     WHO ARE WE?
     The  Gabelli/GAMCO  Funds  are  investment  companies  registered  with the
     Securities  and Exchange  Commission  under the  Investment  Company Act of
     1940.  We are managed by Gabelli  Funds,  LLC and Gabelli  Advisers,  Inc.,
     which are affiliated with GAMCO Investors, Inc.  GAMCO Investors, Inc. is a
     publicly  held  company  that  has  subsidiaries  that  provide  investment
     advisory or brokerage services for a variety of clients.

     WHAT KIND OF NON-PUBLIC INFORMATION DO WE COLLECT ABOUT YOU IF YOU BECOME A
     GABELLI  CUSTOMER?
     If you apply to open an  account  directly  with us,  you will be giving us
     some non-public  information about yourself.  The non-public information we
     collect about you is:

     o  INFORMATION  YOU GIVE US ON YOUR  APPLICATION  FORM.  This could include
        your name,  address,  telephone  number,  social security  number,  bank
        account number, and other information.

     o  INFORMATION  ABOUT YOUR  TRANSACTIONS WITH US, ANY TRANSACTIONS WITH OUR
        AFFILIATES,  AND  TRANSACTIONS  WITH  THE  ENTITIES  WE HIRE TO  PROVIDE
        SERVICES TO YOU.  This would include  information  about the shares that
        you buy or redeem, and the deposits and withdrawals that you make. If we
        hire someone else to provide  services--like  a transfer  agent--we will
        also have information  about the  transactions  that you conduct through
        them.

     WHAT INFORMATION DO WE DISCLOSE AND TO WHOM DO WE DISCLOSE IT?
     We do not disclose any non-public personal  information about our customers
     or former  customers  to anyone,  other than our  affiliates,  our  service
     providers who need to know such information,  and as otherwise permitted by
     law. If you want to find out what the law permits, you can read the privacy
     rules adopted by the Securities and Exchange Commission. They are in volume
     17 of the Code of Federal Regulations, Part 248. The Commission often posts
     information about its regulations on its web site, www.sec.gov.

     WHAT DO WE DO TO PROTECT YOUR PERSONAL INFORMATION?
     We restrict  access to  non-public  personal  information  about you to the
     people who need to know that  information  in order to provide  services to
     you or the Fund and to ensure that we are complying with the laws governing
     the securities business. We maintain physical,  electronic,  and procedural
     safeguards to keep your personal information confidential.
- --------------------------------------------------------------------------------


                             GABELLI FAMILY OF FUNDS

VALUE ________________________________________
GABELLI ASSET FUND
Seeks to invest primarily in a diversified portfolio of common stocks selling at
significant  discounts  to  their  private  market  value.  The  Fund's  primary
objective is growth of capital. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI BLUE CHIP VALUE FUND
Seeks long term growth of capital  through  investment  primarily  in the common
stocks of established  companies which are temporarily out of favor.  The fund's
objective  is to  identify a catalyst or sequence of events that will return the
company to a higher value.
(MULTICLASS)                              PORTFOLIO MANAGER: BARBARA MARCIN, CFA

WESTWOOD EQUITY FUND
Seeks to invest  primarily in the common stock of  well-seasoned  companies that
have  recently  reported  positive  earnings  surprises  and are  trading  below
Westwood's  proprietary  growth rate estimates.  The Fund's primary objective is
capital appreciation.
(MULTICLASS)                                   PORTFOLIO MANAGER: SUSAN M. BYRNE

FOCUSED VALUE ______________________________
GABELLI VALUE FUND
Seeks to invest in  securities  of  companies  believed to be  undervalued.  The
Fund's primary objective is long-term capital appreciation. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

SMALL CAP VALUE ____________________________
GABELLI SMALL CAP FUND
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  less  than $1  billion)  believed  to have  rapid  revenue  and
earnings growth potential. The Fund's primary objective is capital appreciation.
(MULTICLASS)                            PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD SMALLCAP EQUITY FUND
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $2.5 billion or less. The Fund's primary  objective is long-term capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GABELLI WOODLAND SMALL CAP VALUE FUND
Seeks to invest  primarily  in the common  stocks of smaller  companies  (market
capitalizations  less  than  $1.5  billion)  believed  to  be  undervalued  with
shareholder  oriented management teams that are employing strategies to grow the
company's  value.  The  Fund's  primary   objective  is  capital   appreciation.
(MULTICLASS)                          PORTFOLIO MANAGER: ELIZABETH M. LILLY, CFA

GROWTH ______________________________________
GAMCO GROWTH FUND
Seeks to invest  primarily in large cap stocks believed to have  favorable,  yet
undervalued,  prospects for earnings  growth.  The Fund's  primary  objective is
capital appreciation. (MULTICLASS)        PORTFOLIO MANAGER: HOWARD F. WARD, CFA

GAMCO INTERNATIONAL GROWTH FUND
Seeks to invest in the equity  securities  of  foreign  issuers  with  long-term
capital   appreciation    potential.    The   Fund   offers   investors   global
diversification. (MULTICLASS)                    PORTFOLIO MANAGER: CAESAR BRYAN

AGGRESSIVE GROWTH _________________________
GAMCO GLOBAL GROWTH FUND
Seeks capital appreciation through a disciplined  investment program focusing on
the globalization and interactivity of the world's marketplace. The Fund invests
in  companies  at the  forefront  of  accelerated  growth.  The  Fund's  primary
objective is capital appreciation. (MULTICLASS)                     TEAM MANAGED

MICRO-CAP ___________________________________
WESTWOOD MIGHTY MITES(SM) FUND
Seeks to invest in micro-cap companies that have market  capitalizations of $300
million or less. The Fund's primary objective is long-term capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

EQUITY INCOME _______________________________
GABELLI EQUITY INCOME FUND
Seeks to invest primarily in equity securities with above market average yields.
The Fund pays monthly  dividends  and seeks a high level of total return with an
emphasis on income. (MULTICLASS)        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD BALANCED FUND
Seeks to invest in a balanced and diversified portfolio of stocks and bonds. The
Fund's primary objective is both capital appreciation and current income.
(MULTICLASS)                            CO-PORTFOLIO MANAGERS: SUSAN M. BYRNE
                                                               MARK FREEMAN, CFA

WESTWOOD INCOME FUND
Seeks to  provide   a high level of  current income as well as long-term capital
appreciation  by  investing  in   income   producing  equity  and  fixed  income
securities. (MULTICLASS)                       PORTFOLIO MANAGER: SUSAN M. BYRNE

SPECIALTY EQUITY ____________________________
GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
Seeks to invest  principally in bonds and preferred stocks which are convertible
into  common  stock of  foreign  and  domestic  companies.  The  Fund's  primary
objective is total return  through a combination  of current  income and capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GAMCO GLOBAL OPPORTUNITY FUND
Seeks to invest in common stock of companies which have rapid growth in revenues
and  earnings  and  potential  for above  average  capital  appreciation  or are
undervalued. The Fund's primary objective is capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

SECTOR ______________________________________
GAMCO GLOBAL TELECOMMUNICATIONS FUND
Seeks to invest in telecommunications companies throughout the world - targeting
undervalued  companies with strong  earnings and cash flow dynamics.  The Fund's
primary objective is capital appreciation. (MULTICLASS)             TEAM MANAGED

GAMCO GOLD FUND
Seeks to invest in a global  portfolio of equity  securities  of gold mining and
related  companies.  The Fund's  objective  is long-term  capital  appreciation.
Investment in gold stocks is considered speculative and is affected by a variety
of world-wide economic, financial, and political factors. (MULTICLASS)
                                                 PORTFOLIO MANAGER: CAESAR BRYAN

GABELLI UTILITIES FUND
Seeks to provide a high level of total return  through a combination  of capital
appreciation and current income. (MULTICLASS)                       TEAM MANAGED

MERGER AND ARBITRAGE _____________________
GABELLI ABC FUND
Seeks to invest in securities with attractive  opportunities for appreciation or
investment  income.  The Fund's  primary  objective  is total  return in various
market conditions without excessive risk of capital loss.
(NO-LOAD)                               PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

CONTRARIAN_________________________________
GAMCO MATHERS FUND
Seeks  long-term  capital  appreciation  in various  market  conditions  without
excessive risk of capital loss. (CLASS AAA-NO-LOAD)
                                        PORTFOLIO MANAGER: HENRY VAN DER EB, CFA

COMSTOCK CAPITAL VALUE FUND
Seeks capital  appreciation and current income.  The Fund may use either long or
short positions to achieve its objective.
(MULTICLASS)                               PORTFOLIO MANAGER: MARTIN WEINER, CFA

COMSTOCK STRATEGY FUND
The Fund emphasizes investments in debt securities,  which maximize total return
in light of credit risk,  interest rate risk, and the risk  associated  with the
length of maturity of the debt instrument. (MULTICLASS)
                                           PORTFOLIO MANAGER: MARTIN WEINER, CFA

FIXED INCOME ________________________________
WESTWOOD INTERMEDIATE BOND FUND
Seeks to invest in a diversified portfolio of bonds with various maturities. The
Fund's primary objective is total return.
(MULTICLASS)                                PORTFOLIO MANAGER: MARK FREEMAN, CFA

CASH MANAGEMENT-MONEY MARKET __________
GABELLI U.S. TREASURY MONEY MARKET FUND
Seeks to invest exclusively in short-term U.S. Treasury  securities.  The Fund's
primary  objective  is to  provide  high  current  income  consistent  with  the
preservation of principal and liquidity. (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI

AN INVESTMENT IN THE ABOVE MONEY MARKET FUND  IS NEITHER  INSURED NOR GUARANTEED
BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT AGENCY.  ALTHOUGH
THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR  INVESTMENT AT $1.00 PER SHARE,  IT
IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND.

THE GLOBAL FUNDS INVEST IN FOREIGN SECURITIES WHICH INVOLVE RISKS NOT ORDINARILY
ASSOCIATED WITH INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING CURRENCY FLUCTUATION,
ECONOMIC, AND POLITICAL RISKS.

 TO RECEIVE A PROSPECTUS, CALL 800-GABELLI (422-3554). INVESTORS SHOULD CONSIDER
THE INVESTMENT OBJECTIVES, RISKS, AND CHARGES AND EXPENSES OF THE FUND CAREFULLY
       BEFORE INVESTING. THE PROSPECTUS CONTAINS MORE COMPLETE INFORMATION
   ABOUT THIS AND OTHER MATTERS AND SHOULD BE READ CAREFULLY BEFORE INVESTING.

                         GAMCO Global Series Funds, Inc.
                  THE GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
                              One Corporate Center
                            Rye, New York 10580-1422
                                   800-GABELLI
                                  800-422-3554
                                FAX: 914-921-5118
                            WEBSITE: WWW.GABELLI.COM
                            E-MAIL: INFO@GABELLI.COM
                   Net Asset Value available daily by calling
                           800-GABELLI after 6:00 P.M.

                               BOARD OF DIRECTORS

Mario J. Gabelli, CFA                          John D. Gabelli
CHAIRMAN AND CHIEF                             SENIOR VICE PRESIDENT
EXECUTIVE OFFICER                              GABELLI & COMPANY, INC.
GAMCO INVESTORS, INC.

E. Val Cerutti                                 Werner J. Roeder,  MD
CHIEF EXECUTIVE OFFICER                        MEDICAL  DIRECTOR
CERUTTI CONSULTANTS, INC.                      LAWRENCE HOSPITAL

Anthony J. Colavita                            Anthonie C. van Ekris
ATTORNEY-AT-LAW                                MANAGING DIRECTOR
ANTHONY J. COLAVITA, P.C.                      BALMAC INTERNATIONAL, INC.

Arthur V. Ferrara                              Salvatore J. Zizza
FORMER CHAIRMAN AND                            CHAIRMAN
CHIEF EXECUTIVE OFFICER                        HALLMARK ELECTRICAL
GUARDIAN LIFE INSURANCE                        SUPPLIES CORP.
COMPANY OF AMERICA

                                    OFFICERS

Bruce N. Alpert                                James E. McKee
PRESIDENT AND TREASURER                        SECRETARY

Peter D. Goldstein
CHIEF COMPLIANCE OFFICER

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP


- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
GAMCO Global Convertible  Securities Fund. It is not authorized for distribution
to  prospective  investors  unless  preceded  or  accompanied  by  an  effective
prospectus.
- --------------------------------------------------------------------------------

GAB441Q405SR


                                                            GAMCO


                                                            THE
                                                            GAMCO
                                                            GLOBAL
                                                            CONVERTIBLE
                                                            SECURITIES
                                                            FUND

                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2005


                          THE GAMCO GLOBAL GROWTH FUND

                                  ANNUAL REPORT
                               DECEMBER 31, 2005





TO OUR SHAREHOLDERS,

      The Sarbanes-Oxley Act requires a Fund's principal executive and financial
officers  to  certify  the  entire   contents  of  the  semi-annual  and  annual
shareholder  reports in a filing with the Securities and Exchange  Commission on
Form N-CSR. This certification  would cover the portfolio  manager's  commentary
and  subjective  opinions  if they are  attached  to or a part of the  financial
statements. Many of these comments and opinions would be difficult or impossible
to certify.

      Because we do not want our portfolio  managers to eliminate their opinions
and/or  restrict their  commentary to historical  facts, we have separated their
commentary from the financial  statements and investment portfolio and have sent
it to  you  separately.  Both  the  commentary  and  the  financial  statements,
including  the  portfolio  of  investments,  will be available on our website at
www.gabelli.com/funds.

      Enclosed are the audited financial statements and the investment portfolio
as of  December  31,  2005 with a  description  of  factors  that  affected  the
performance during the past year.

PERFORMANCE DISCUSSION

      Our focus is on picking stocks, not currencies or countries.  We construct
portfolios to be well diversified by country,  sector,  and issue.  While we may
make  occasional  investments  in  emerging  markets,  we  invest  primarily  in
developed markets.  We invest for the long term and have below average portfolio
turnover. This was a successful formula for 2005, as the Fund returned 13.7% for
the year, compared to 11.4% for the MSCI AC World Free Index.

      Good news on profits and economic growth  continued to overwhelm  concerns
about energy prices,  inflation, and geopolitical tensions as most stock markets
finished  the year on a positive  note.  While the energy  and  utility  sectors
suffered  from year end profit taking in the fourth  quarter,  all other sectors
posted  gains,  with the  exception  of  telecom  services,  which  claims  some
distinction as the only sector with a negative return for the year (based on the
MSCI AC World Free Index data).  The dollar gained a bit on the major currencies
eating into returns for  dollar-based  investors  active in those stock markets.
Emerging  markets were higher in the  aggregate  but results  varied  greatly by
market.

      For the year, Canada gets the gold medal, showing a rise (in U.S. dollars)
of 28.3%.  Japan  takes the  silver,  rising  25.5%,  Austria  takes the  bronze
(+24.6%),  followed by Denmark  (+24.5%),  and Norway (+24.3%).  Bringing up the
rear were Ireland (-2.3%), Portugal (-1.9%), New Zealand (+1.7%), Italy (+1.9%),
and Spain (+4.4%).

      In 2005,  energy  stocks  rode the trend of rising oil  prices,  advancing
31.2%.  Materials  stocks were also popular,  given rising prices for metals and
other  commodities,  with the materials  sector advancing 20.5%. Low bond yields
contributed  to the rising demand for income  stocks,  and utilities rose 14.1%.
Other sectors with double digit gains were industrials (+12.5%),  and financials
(+12.3%).  In addition to telecom  services  (-5.6%),  the other  laggards  were
consumer discretionary (+2.3%), information technology (+6.8%), consumer staples
(+7.0%), and health care (+9.4%).


      Fund  performance  during  the past  twelve  months  was  enhanced  by our
generally  overweight  commitment to energy and metals and mining,  the two best
performing sectors. Our lack of exposure to utilities, the third best performing
sector, was a negative.  However,  our growth bias in stock selection  generally
keeps utilities off our radar screen.  We had strong  performing stocks across a
number  of  different  industries.  Our top  stock  was  Vallourec  SA, a French
industrial  company,  which rose 330% (in local currency).  This was followed by
Peabody Energy Corp.  (+104%),  Koninklijke  BAM Groep NV (+93%),  Suncor Energy
Inc.  (+78%),  Nikko Cordial Corp.  (+72%),  and Genentech  Inc.  (+70%).  Other
exceptional  performers included Google Inc. (+67% since purchased),  Transocean
Inc. (+64%),  Whole Foods Markets Inc. (+62%),  Richemont AG (+53%), and Samsung
Electronics Co. Ltd. (+47%).

                                                           Sincerely yours,

                                                           /s/ Bruce N. Alpert

                                                           Bruce N. Alpert
                                                           President
February 15, 2006


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

The following table presents portfolio holdings as a percent of total net assets
as of December 31, 2005:


THE GAMCO GLOBAL GROWTH FUND

Financial Services ................................. 15.8%
Health Care ........................................ 13.5%
Energy and Utilities ...............................  8.5%
Computer Software and Services .....................  7.3%
Food and Beverage ..................................  7.2%
Diversified Industrial .............................  5.6%
Metals and Mining ..................................  5.6%
Retail .............................................  5.4%
Consumer Products ..................................  4.8%
Electronics ........................................  4.4%
Building and Construction ..........................  2.8%
Entertainment ......................................  2.8%
Equipment and Supplies .............................  2.0%
Telecommunications .................................  2.0%
Business Services ..................................  1.9%
Machinery ..........................................  1.8%
Aerospace ..........................................  1.7%
Wireless Communications ............................  1.7%
U.S. Government Obligations ........................  1.3%
Broadcasting .......................................  1.2%
Hotels and Gaming ..................................  0.8%
Chemicals and Allied Products ......................  0.8%
Consumer Services ..................................  0.8%
Cable and Satellite ................................  0.5%
Other Assets and Liabilities - (Net) ............... (0.2)%
                                                    ------
                                                    100.0%
                                                    =======


THE FUND FILES A COMPLETE  SCHEDULE OF PORTFOLIO  HOLDINGS  WITH THE SEC FOR THE
FIRST AND THIRD  QUARTERS OF EACH FISCAL YEAR ON FORM N-Q, THE LAST OF WHICH WAS
FILED FOR THE QUARTER  ENDED  SEPTEMBER 30, 2005.  SHAREHOLDERS  MAY OBTAIN THIS
INFORMATION   AT   WWW.GABELLI.COM   OR  BY  CALLING  THE  FUND  AT  800-GABELLI
(800-422-3554).  THE  FUND'S  FORM N-Q IS  AVAILABLE  ON THE  SEC'S  WEBSITE  AT
WWW.SEC.GOV  AND MAY ALSO BE  REVIEWED  AND  COPIED AT THE  COMMISSION'S  PUBLIC
REFERENCE  ROOM IN  WASHINGTON,  DC.  INFORMATION ON THE OPERATION OF THE PUBLIC
REFERENCE ROOM MAY BE OBTAINED BY CALLING 1-800-SEC-0330.


PROXY VOTING

The Fund files Form N-PX with its complete proxy voting record for the 12 months
ended June 30th,  no later than August 31st of each year. A  description  of the
Fund's  proxy  voting  policies,  procedures,  and how the  Fund  voted  proxies
relating to portfolio securities are available without charge, upon request, (i)
by calling 800-GABELLI  (800-422-3554);  (ii) by writing to The Gabelli Funds at
One Corporate Center,  Rye, NY 10580-1422;  and (iii) by visiting the Securities
and Exchange Commission's website at www.sec.gov.

                                       2


                               [GRAPHIC OMITTED]
                              PLOT POINTS FOLLOW:

          COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN THE
    GAMCO GLOBAL GROWTH FUND CLASS AAA SHARES, THE LIPPER GLOBAL FUND AVERAGE
                        AND THE MSCI AC WORLD FREE INDEX

              Gabelli Global          Lipper Global Multi-Cap       MSCI AC
       Growth Fund Class AAA Shares     Growth Fund Average     World Free Index
2/7/94            $10,000                      $10,000               $10,000
12/31/94           10,250                        9,835                 9,849
12/31/95           12,083                       11,214                11,766
12/31/96           13,594                       13,042                13,319
12/31/97           19,263                       14,742                15,315
12/31/98           24,836                       16,856                18,680
12/31/99           53,645                       22,938                23,690
12/31/00           33,534                       20,582                20,387
12/31/01           25,435                       17,007                17,144
12/31/02           19,130                       13,686                13,890
12/31/03           27,048                       18,078                18,700
12/31/04           29,598                       20,717                21,645
12/31/05           33,659                       23,118                24,106

PAST PERFORMANCE IS NOT PREDICTIVE OF FUTURE RESULTS. The performance tables and
graph do not reflect the deduction of taxes that a shareholder would pay on fund
distributions or the redemption of fund shares.

COMPARATIVE RESULTS
- --------------------------------------------------------------------------------



              AVERAGE ANNUAL RETURNS THROUGH DECEMBER 31, 2005 (A)
              ----------------------------------------------------
                                                                                                             Since
                                                                                                           Inception
                                                   QUARTER     1 YEAR     3 YEAR      5 YEAR      10 YEAR  (2/7/94)
- -------------------------------------------------------------------------------------------------------------------
                                                                                          
 GAMCO GLOBAL GROWTH FUND CLASS AAA ..............  3.64%     13.72%      20.73%       0.08%      10.79%    10.73%
 MSCI AC World Free Index ........................  3.43      11.37       20.18        3.41        7.44      7.66
 Lipper Global Multi-Cap Growth Fund Average .....  3.81      11.60       20.42        2.90        9.93      9.13
 Class A .........................................  3.59      13.66       20.74        0.10       10.80     10.74
                                                   (2.39)(b)   7.12(b)    18.38(b)    (1.08)(b)   10.15(b)  10.19(b)
 Class B .........................................  3.48      12.87       19.83       (0.65)      10.35     10.37
                                                   (1.52)(c)   7.87(c)    19.13(c)    (1.05)(c)   10.35(c)  10.37(c)
 Class C .........................................  3.43      12.85       19.83       (0.66)      10.32     10.34
                                                    2.43(c)   11.85(c)    19.83(c)    (0.66)(c)   10.32(c)  10.34(c)

 (a) RETURNS  REPRESENT PAST  PERFORMANCE AND DO NOT  GUARANTEE  FUTURE RESULTS.
     TOTAL RETURNS AND AVERAGE ANNUAL RETURNS REFLECT CHANGES IN SHARE PRICE AND
     REINVESTMENT OF DIVIDENDS AND ARE NET OF EXPENSES.  INVESTMENT  RETURNS AND
     THE  PRINCIPAL  VALUE OF AN  INVESTMENT  WILL  FLUCTUATE.  WHEN  SHARES ARE
     REDEEMED,  THEY MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL COST. CURRENT
     PERFORMANCE  MAY BE LOWER OR HIGHER THAN THE  PERFORMANCE  DATA  PRESENTED.
     PERFORMANCE  RETURNS  FOR  PERIODS  LESS THAN ONE YEAR ARE NOT  ANNUALIZED.
     VISIT  WWW.GABELLI.COM  FOR  PERFORMANCE  INFORMATION AS OF THE MOST RECENT
     MONTH END.  INVESTORS  SHOULD  CONSIDER THE INVESTMENT  OBJECTIVES,  RISKS,
     CHARGES,  AND  EXPENSES  OF  THE  FUND  CAREFULLY  BEFORE  INVESTING.   THE
     PROSPECTUS  CONTAINS  MORE  INFORMATION  ABOUT THIS AND OTHER  MATTERS  AND
     SHOULD BE READ CAREFULLY BEFORE INVESTING.
     THE CLASS AAA SHARES' NET ASSET  VALUES ARE USED TO  CALCULATE  PERFORMANCE
     FOR THE PERIODS PRIOR TO THE ISSUANCE OF CLASS A SHARES, CLASS B SHARES AND
     CLASS C  SHARES  ON  MARCH  2,  2000,  MAY 5,  2000  AND  MARCH  12,  2000,
     RESPECTIVELY.  THE  ACTUAL  PERFORMANCE  FOR THE CLASS B SHARES AND CLASS C
     SHARES WOULD HAVE BEEN LOWER DUE TO THE ADDITIONAL EXPENSES ASSOCIATED WITH
     THESE CLASSES OF SHARES. INVESTING IN FOREIGN SECURITIES INVOLVES RISKS NOT
     ORDINARILY  ASSOCIATED  WITH  INVESTMENTS  IN  DOMESTIC  ISSUES,  INCLUDING
     CURRENCY FLUCTUATION,  ECONOMIC AND POLITICAL RISKS. THE MSCI AC WORLD FREE
     INDEX IS AN  UNMANAGED  INDICATOR OF STOCK  MARKET  PERFORMANCE,  WHILE THE
     LIPPER AVERAGE REFLECTS THE AVERAGE  PERFORMANCE OF MUTUAL FUNDS CLASSIFIED
     IN THIS PARTICULAR CATEGORY.
 (b) INCLUDES THE EFFECT OF THE MAXIMUM  5.75% SALES CHARGE AT THE BEGINNING OF
     THE PERIOD.
 (c) INCLUDES THE EFFECT OF THE APPLICABLE  CONTINGENT DEFERRED SALES CHARGE AT
     THE END OF THE PERIOD  SHOWN FOR CLASS B AND CLASS C SHARES,  RESPECTIVELY.
     CLASS B SHARES ARE NOT AVAILABLE FOR NEW PURCHASES.
- --------------------------------------------------------------------------------

                                       3


THE GAMCO GLOBAL GROWTH FUND
DISCLOSURE OF FUND EXPENSES (UNAUDITED)
For the Six Month Period from July 1, 2005 through December 31, 2005
                                                                   EXPENSE TABLE
================================================================================


We believe it is important for you to understand the impact of fees and expenses
regarding  your  investment.  All mutual  funds have  operating  expenses.  As a
shareholder  of a fund,  you  incur  ongoing  costs,  which  include  costs  for
portfolio  management,  administrative  services,  and shareholder reports (like
this one), among others.  Operating  expenses,  which are deducted from a fund's
gross income,  directly  reduce the investment  return of a fund.  When a fund's
expenses are expressed as a percentage of its average net assets, this figure is
known as the expense  ratio.  The  following  examples  are intended to help you
understand  the  ongoing  costs (in  dollars) of  investing  in your Fund and to
compare these costs with those of other mutual funds.  The examples are based on
an  investment  of $1,000 made at the beginning of the period shown and held for
the entire period.

The Expense Table below illustrates your Fund's costs in two ways:

ACTUAL FUND  RETURN:  This section  provides  information  about actual  account
values and actual expenses. You may use this section to help you to estimate the
actual  expenses that you paid over the period after any fee waivers and expense
reimbursements.  The "Ending  Account  Value"  shown is derived  from the Fund's
ACTUAL return during the past six months,  and the "Expenses Paid During Period"
shows the dollar  amount  that would have been paid by an  investor  who started
with $1,000 in the Fund. You may use this information,  together with the amount
you invested, to estimate the expenses that you paid over the period.

To do so, simply  divide your account  value by $1,000 (for  example,  an $8,600
account value  divided by $1,000 = 8.6),  then multiply the result by the number
given for your Fund under the heading  "Expenses Paid During Period" to estimate
the expenses you paid during this period.



HYPOTHETICAL 5% RETURN:  This section provides  information  about  hypothetical
account  values and  hypothetical  expenses  based on the Fund's actual  expense
ratio. It assumes a hypothetical  annualized return of 5% before expenses during
the period shown. In this case - because the hypothetical return used is NOT the
Fund's  actual  return - the  results  do not apply to your  investment  and you
cannot use the  hypothetical  account  value and expense to estimate  the actual
ending  account  balance or expenses  you paid for the period.  This  example is
useful in making  comparisons  of the ongoing costs of investing in the Fund and
other  funds.  To do so,  compare  this  5%  hypothetical  example  with  the 5%
hypothetical examples that appear in shareholder reports of other funds.

Please note that the  expenses  shown in the table are meant to  highlight  your
ongoing  costs only and do not  reflect  any  transactional  costs such as sales
charges (loads),  redemption fees, or exchange fees, if any, which are described
in the Prospectus. If these costs were applied to your account, your costs would
be higher.  Therefore, the 5% hypothetical return is useful in comparing ongoing
costs only,  and will not help you determine the relative  total costs of owning
different funds. The "Annualized  Expense Ratio"  represents the actual expenses
for the last six  months  and may be  different  from the  expense  ratio in the
Financial Highlights which is for the year ended December 31, 2005.

                    Beginning       Ending       Annualized     Expenses
                  Account Value  Account Value     Expense     Paid During
                    07/01/05       12/31/05         Ratio        Period*
- --------------------------------------------------------------------------------
THE GAMCO GLOBAL GROWTH FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Class AAA         $1,000.00      $1,136.60          1.73%       $ 9.32
Class A           $1,000.00      $1,136.60          1.74%       $ 9.37
Class B           $1,000.00      $1,132.60          2.48%       $13.33
Class C           $1,000.00      $1,132.40          2.49%       $13.38

HYPOTHETICAL 5% RETURN
Class AAA          $1,000.00     $1,016.48          1.73%       $ 8.79
Class A            $1,000.00     $1,016.43          1.74%       $ 8.84
Class B            $1,000.00     $1,012.70          2.48%       $12.58
Class C            $1,000.00     $1,012.65          2.49%       $12.63

*  Expenses are equal to the Fund's  annualized  expense  ratio for the last six
   months multiplied by the average account value over the period, multiplied by
   the number of days in the most recent fiscal half-year, then divided by 365.

                                       4


THE GAMCO GLOBAL GROWTH FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2005
================================================================================
                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              COMMON STOCKS -- 98.9%
              AEROSPACE -- 1.7%
       8,358  Northrop Grumman Corp. ............... $    431,525  $    502,399
      25,000  United Technologies Corp. ............    1,221,038     1,397,750
                                                     ------------  ------------
                                                        1,652,563     1,900,149
                                                     ------------  ------------
              BROADCASTING -- 1.2%
       7,000  Lagardere SCA ........................      399,739       538,672
       5,200  Nippon Television Network Corp. ......      771,307       799,389
                                                     ------------  ------------
                                                        1,171,046     1,338,061
                                                     ------------  ------------
              BUILDING AND CONSTRUCTION -- 2.8%
      20,000  CRH plc ..............................      482,219       588,396
      15,000  Fomento de Construcciones
                y Contratas SA .....................      402,698       850,628
       5,000  Koninklijke BAM Groep NV .............      139,129       419,691
      50,000  Sekisui House Ltd. ...................      522,442       629,160
      10,000  Technip SA ...........................      312,581       601,418
                                                     ------------  ------------
                                                        1,859,069     3,089,293
                                                     ------------  ------------
              BUSINESS SERVICES -- 1.9%
       6,500  Getty Images Inc.+ ...................      469,625       580,255
       2,800  Hakuhodo Dy Holdings Inc. ............      191,989       197,295
      10,000  SAP AG, ADR ..........................      452,250       450,700
      16,000  Secom Co. Ltd. .......................      620,342       837,071
                                                     ------------  ------------
                                                        1,734,206     2,065,321
                                                     ------------  ------------
              CABLE AND SATELLITE -- 0.5%
      12,250  Rogers Communications
                Inc., Cl. B ........................       84,714       518,474
                                                     ------------  ------------
              CHEMICALS AND ALLIED PRODUCTS -- 0.8%
      13,000  Shin-Etsu Chemical Co. Ltd. ..........      458,472       691,144
      50,000  Tokai Carbon Co. Ltd. ................      205,108       232,331
                                                     ------------  ------------
                                                          663,580       923,475
                                                     ------------  ------------
              COMPUTER SOFTWARE AND SERVICES -- 7.3%
      20,000  Adobe Systems Inc. ...................      603,573       739,200
      35,000  Cisco Systems Inc.+ ..................      692,075       599,200
      20,000  Dell Inc.+ ...........................      838,976       599,800
       9,000  Electronic Arts Inc.+ ................      467,980       470,790
      40,000  EMC Corp.+ ...........................      524,899       544,800
       3,200  Google Inc., Cl. A+ ..................      794,052     1,327,552
      75,000  Microsoft Corp. ......................    2,015,860     1,961,250
      13,000  NAVTEQ Corp.+ ........................      523,311       570,310
      30,000  Yahoo! Inc.+ .........................    1,104,800     1,175,400
                                                     ------------  ------------
                                                        7,565,526     7,988,302
                                                     ------------  ------------
              CONSUMER PRODUCTS -- 4.8%
       9,924  Altadis SA ...........................      166,300       450,220
       7,000  Christian Dior SA ....................      438,852       622,373
      15,314  Compagnie Financiere
                Richemont AG, Cl. A ................      443,000       666,612

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------

      17,247  Gallaher Group plc ................... $    173,860  $    260,383
       6,000  Harman International
                Industries Inc. ....................      529,406       587,100
      27,000  Luxottica Group SpA ..................      477,982       685,013
      25,000  Procter & Gamble Co. .................    1,382,601     1,447,000
       4,000  Swatch Group AG, Cl. B ...............      464,406       593,585
                                                     ------------  ------------
                                                        4,076,407     5,312,286
                                                     ------------  ------------
              CONSUMER SERVICES -- 0.8%
      20,000  eBay Inc.+ ...........................      696,529       865,000
                                                     ------------  ------------
              DIVERSIFIED INDUSTRIAL -- 5.6%
      10,000  3M Co. ...............................      807,181       775,000
      25,000  Bouygues SA ..........................      905,762     1,222,371
      75,000  General Electric Co. .................    2,728,135     2,628,750
       9,000  ITT Industries Inc. ..................      786,992       925,380
      10,000  Rockwell Automation Inc. .............      611,683       591,600
                                                     ------------  ------------
                                                        5,839,753     6,143,101
                                                     ------------  ------------
              ELECTRONICS -- 4.4%
      15,000  Broadcom Corp., Cl. A+ ...............      492,170       707,250
      25,000  Intel Corp. ..........................      565,750       624,000
      30,000  Linear Technology Corp. ..............    1,168,726     1,082,100
      20,000  Microchip Technology Inc. ............      572,524       643,000
       1,070  Samsung Electronics Co. Ltd. .........      175,381       697,561
      20,000  Texas Instruments Inc. ...............      405,221       641,400
       8,000  Tokyo Electron Ltd. ..................      436,931       502,650
                                                     ------------  ------------
                                                        3,816,703     4,897,961
                                                     ------------  ------------
              ENERGY AND UTILITIES -- 8.5%
      10,000  Baker Hughes Inc. ....................      451,875       607,800
       8,000  BP plc, ADR ..........................      466,366       513,760
      12,000  Canadian Natural Resources Ltd. ......      501,440       595,440
      20,000  Chesapeake Energy Corp. ..............      635,060       634,600
       4,266  ConocoPhillips .......................      104,053       248,196
      11,172  Devon Energy Corp. ...................      350,560       698,697
      12,000  EnCana Corp. .........................      576,522       541,920
      10,000  Murphy Oil Corp. .....................      458,214       539,900
       6,000  Occidental Petroleum Corp. ...........      417,900       479,280
      10,288  Pioneer Natural Resources Co. ........      334,556       527,466
      15,000  Repsol YPF SA ........................      476,045       438,100
       8,500  Schlumberger Ltd. ....................      538,841       825,775
      10,000  Suncor Energy Inc. ...................      340,290       631,300
       2,063  Total SA .............................      356,308       518,271
       4,000  Total SA, ADR ........................      428,556       505,600
       9,000  Transocean Inc.+ .....................      366,974       627,210
       9,000  Valero Energy Corp. ..................      438,558       464,400
                                                     ------------  ------------
                                                        7,242,118     9,397,715
                                                     ------------  ------------

                See accompanying notes to financial statements.

                                       5


THE GAMCO GLOBAL GROWTH FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              COMMON STOCKS (CONTINUED)
              ENTERTAINMENT -- 2.8%
      90,000  Publishing & Broadcasting Ltd. ....... $    502,272  $  1,087,334
      60,239  Time Warner Inc. .....................      831,264     1,050,568
      30,180  Vivendi Universal SA .................      747,074       945,414
                                                     ------------  ------------
                                                        2,080,610     3,083,316
                                                     ------------  ------------
              EQUIPMENT AND SUPPLIES -- 2.0%
      20,000  Ingersoll-Rand Co. Ltd., Cl. A .......      803,357       807,400
       2,600  Keyence Corp. ........................      544,556       739,645
       1,150  Vallourec SA .........................      107,619       633,087
                                                     ------------  ------------
                                                        1,455,532     2,180,132
                                                     ------------  ------------
              FINANCIAL SERVICES -- 15.8%
      27,000  77 Bank Ltd. .........................      197,165       205,130
       5,500  Allianz AG ...........................      704,835       833,071
      10,000  American Express Co. .................      491,340       514,600
      60,000  Anglo Irish Bank Corp. plc ...........      141,074       910,651
      30,000  Australia & New Zealand
                Banking Group Ltd. .................      505,275       526,732
      30,000  Aviva plc ............................      320,646       363,883
      29,039  Bank of Ireland, Ireland .............      280,065       457,586
      10,000  Bank of Ireland, London ..............      159,392       157,458
      36,000  Citigroup Inc. .......................    1,693,228     1,747,080
      20,000  Credit Suisse Group, ADR .............      942,161     1,019,000
      10,000  Goldman Sachs Group Inc. .............    1,049,500     1,277,100
      15,000  HSBC Holdings plc, ADR ...............    1,289,686     1,207,050
      11,914  Irish Life & Permanent plc ...........      129,749       243,451
       5,000  Legg Mason Inc. ......................      588,271       598,450
      19,895  Merrill Lynch & Co. Inc. .............    1,042,319     1,347,488
          50  Mitsubishi UFJ Financial
                Group Inc. .........................      552,547       678,340
      79,500  Nikko Cordial Corp. ..................      817,370     1,259,219
      35,000  Standard Chartered plc ...............      677,808       779,812
      15,000  State Street Corp. ...................      712,853       831,600
      15,000  UBS AG, New York .....................    1,226,314     1,427,250
       2,000  UBS AG, Switzerland ..................      136,647       190,404
      33,000  Westpac Banking Corp. ................      502,533       550,375
      16,000  Yamaguchi Bank Ltd. ..................      202,431       229,957
                                                     ------------  ------------
                                                       14,363,209    17,355,687
                                                     ------------  ------------
              FOOD AND BEVERAGE -- 7.2%
      53,000  Ajinomoto Co. Inc. ...................      602,454       542,426
      60,000  Cadbury Schweppes plc ................      592,403       567,245
      18,996  Coca-Cola Hellenic
                Bottling Co. SA ....................      385,338       559,533
     100,000  Davide Campari-Milano SpA ............      467,325       739,934
      77,000  Diageo plc ...........................      971,581     1,116,124
       6,000  Diageo plc, ADR ......................      326,867       349,800
      12,000  General Mills Inc. ...................      542,811       591,840
       3,000  Nestle SA ............................      850,228       897,226

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
      20,000  PepsiCo Inc. ......................... $  1,020,471  $  1,181,600
       3,763  Pernod-Ricard SA .....................      401,489       656,666
      15,000  Starbucks Corp.+ .....................      413,438       450,150
       5,000  Wrigley (Wm.) Jr. Co. ................      353,869       332,450
                                                     ------------  ------------
                                                        6,928,274     7,984,994
                                                     ------------  ------------
              HEALTH CARE -- 13.5%
      17,000  Amgen Inc.+ ..........................    1,056,128     1,340,620
      10,000  Caremark Rx Inc.+ ....................      381,225       517,900
      10,000  Eli Lilly & Co. ......................      543,034       565,900
      10,000  Genentech Inc.+ ......................      506,391       925,000
      10,000  Genzyme Corp.+ .......................      578,740       707,800
      40,000  GlaxoSmithKline plc ..................      846,223     1,010,959
      15,000  Hisamitsu Pharmaceutical
                Co. Inc. ...........................      252,777       377,751
      20,000  Medtronic Inc. .......................      947,550     1,151,400
      20,000  Novartis AG ..........................      792,163     1,050,949
       6,200  Roche Holding AG .....................      495,746       930,908
      10,530  Sanofi-Aventis .......................      741,849       922,514
      40,000  Smith & Nephew plc ...................      391,880       368,529
      10,000  St. Jude Medical Inc.+ ...............      436,070       502,000
       2,400  Straumann Holding AG .................      504,079       556,143
      20,000  Stryker Corp. ........................      912,862       888,600
       4,800  Synthes Inc. .........................      398,130       539,158
      13,000  Takeda Pharmaceutical Co. Ltd. .......      553,551       703,269
      15,000  Varian Medical Systems Inc.+ .........      576,797       755,100
      15,000  Zimmer Holdings Inc.+ ................    1,213,549     1,011,600
                                                     ------------  ------------
                                                       12,128,744    14,826,100
                                                     ------------  ------------
              HOTELS AND GAMING -- 0.8%
       8,550  Greek Organization of
                Football Prognostics SA ............      101,078       294,559
     102,011  Hilton Group plc .....................      427,567       637,974
                                                     ------------  ------------
                                                          528,645       932,533
                                                     ------------  ------------
              MACHINERY -- 1.8%
      10,000  Caterpillar Inc. .....................      459,402       577,700
      10,000  Deere & Co. ..........................      724,210       681,100
       5,000  SMC Corp. ............................      530,944       714,377
                                                     ------------  ------------
                                                        1,714,556     1,973,177
                                                     ------------  ------------
              METALS AND MINING -- 5.6%
      20,000  BHP Billiton plc .....................      317,858       326,721
      25,404  Freeport-McMoRan Copper &
                Gold Inc., Cl. B ...................      854,573     1,366,735
      61,026  Gold Fields Ltd., ADR ................      528,792     1,075,888
      23,473  Newmont Mining Corp. .................      832,462     1,253,458
      13,614  Peabody Energy Corp. .................      337,506     1,122,066
      16,000  Rio Tinto plc ........................      587,296       730,864
      11,000  Xstrata plc ..........................      288,341       257,385
                                                     ------------  ------------
                                                        3,746,828     6,133,117
                                                     ------------  ------------

                See accompanying notes to financial statements.

                                        6


THE GAMCO GLOBAL GROWTH FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              COMMON STOCKS (CONTINUED)
              RETAIL -- 5.4%
      15,000  Bed Bath & Beyond Inc.+ .............. $    613,399  $    542,250
      15,000  Best Buy Co. Inc. ....................      573,945       652,200
      20,000  Coach Inc.+ ..........................      509,323       666,800
      25,000  Matsumotokiyoshi Co. Ltd. ............      663,268       790,690
      24,000  Seven & I Holdings Co. Ltd.+ .........      813,032     1,027,685
      18,000  Tiffany & Co. ........................      580,736       689,220
      10,000  Wal-Mart Stores Inc. .................      535,178       468,000
      19,000  Walgreen Co. .........................      737,867       840,940
       3,400  Whole Foods Market Inc. ..............      156,629       263,126
                                                     ------------  ------------
                                                        5,183,377     5,940,911
                                                     ------------  ------------
              TELECOMMUNICATIONS -- 2.0%
         115  KDDI Corp. ...........................      590,072       663,077
      25,000  TDC A/S ..............................      931,760     1,497,541
                                                     ------------  ------------
                                                        1,521,832     2,160,618
                                                     ------------  ------------
              WIRELESS COMMUNICATIONS -- 1.7%
     350,000  O2 plc ...............................      410,107     1,190,794
      15,000  QUALCOMM Inc. ........................      621,961       646,200
                                                     ------------  ------------
                                                        1,032,068     1,836,994
                                                     ------------  ------------
              TOTAL COMMON STOCKS ..................   87,085,889   108,846,717
                                                     ------------  ------------

   PRINCIPAL                                                         MARKET
    AMOUNT                                                COST        VALUE
   ---------                                              ----       -------
              U.S. GOVERNMENT OBLIGATIONS -- 1.3%
  $1,398,000  U.S. Treasury Bills,
                3.891% to 4.004%++,
                02/02/06 to 03/30/06 ............... $  1,389,477  $  1,389,398
                                                     ------------  ------------
              TOTAL INVESTMENTS -- 100.2% .......... $ 88,475,366   110,236,115
                                                     ============
              OTHER ASSETS AND
                LIABILITIES (NET) -- (0.2)% ......................     (214,832)
                                                                   ------------
              NET ASSETS -- 100.0% ............................... $110,021,283
                                                                   ============
- ----------------
 +   Non-income producing security.
 ++  Represents annualized yield at date of purchase.
 ADR American Depository Receipt


                                        % OF
                                       MARKET      MARKET
GEOGRAPHIC DIVERSIFICATION              VALUE      VALUE
- --------------------------            --------    --------
North America ........................  52.5%   $ 57,921,798
Europe ...............................  31.9      35,121,211
Japan ................................  10.7      11,820,605
Asia/Pacific .........................   2.6       2,862,003
Latin America ........................   1.3       1,434,610
South Africa .........................   1.0       1,075,888
                                       ------   ------------
                                       100.0%   $110,236,115
                                       ======   ============

                 See accompanying notes to financial statements.

                                       7


                          THE GAMCO GLOBAL GROWTH FUND


STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2005
================================================================================

ASSETS:
  Investments, at value (cost $88,475,366) ...................  $ 110,236,115
  Cash .......................................................            605
  Dividends and interest receivable ..........................        128,922
  Receivable for Fund shares sold ............................         64,930
  Other assets ...............................................          4,808
                                                                -------------
  TOTAL ASSETS ...............................................    110,435,380
                                                                -------------
LIABILITIES:
  Payable for Fund shares redeemed ...........................        144,230
  Payable for investment advisory fees .......................         94,472
  Payable for shareholder communications expenses ............         52,412
  Payable for shareholder services fees ......................         42,351
  Payable for legal and audit fees ...........................         37,200
  Payable for distribution fees ..............................         23,883
  Other accrued expenses .....................................         19,549
                                                                -------------
  TOTAL LIABILITIES ..........................................        414,097
                                                                -------------
  NET ASSETS applicable to 5,386,367 shares outstanding ......  $ 110,021,283
                                                                =============
NET ASSETS CONSIST OF:
  Capital stock, each class at $0.001 par value ..............  $       5,386
  Additional paid-in capital .................................    156,564,422
  Accumulated net investment income ..........................            374
  Accumulated net realized loss on investments
    and foreign currency transactions ........................    (68,308,116)
  Net unrealized appreciation on investments .................     21,760,749
  Net unrealized depreciation on foreign currency translations         (1,532)
                                                                -------------
  NET ASSETS .................................................  $ 110,021,283
                                                                =============
SHARES OF CAPITAL STOCK:
  CLASS AAA:
  Net Asset Value, offering and redemption
    price per share ($108,433,143 /
    5,307,744 shares outstanding;
    75,000,000 shares authorized) ............................         $20.43
                                                                       ======
  CLASS A:
  Net Asset Value and redemption price per share
   ($1,149,928 / 56,277 shares outstanding;
   50,000,000 shares authorized) .............................         $20.43
                                                                       ======
  Maximum offering price per share
    (NAV / 0.9425, based on maximum sales
    charge of 5.75% of the offering price) ...................         $21.68
                                                                       ======
  CLASS B:
  Net Asset Value and offering price per share
    ($201,636 / 10,263 shares outstanding;
    25,000,000 shares authorized) ............................         $19.65(a)
                                                                       ======
  CLASS C:
  Net Asset Value and offering price per share
    ($236,576 / 12,083 shares outstanding;
    25,000,000 shares authorized) ............................         $19.58(a)
                                                                       ======
- -----------------------
(a) Redemption price varies based on length of time held.



STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2005
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $112,568) .......   $  1,962,150
  Interest ...........................................         71,652
                                                         ------------
  TOTAL INVESTMENT INCOME ............................      2,033,802
                                                         ------------
EXPENSES:
  Investment advisory fees ...........................      1,074,091
  Distribution fees - Class AAA ......................        266,305
  Distribution fees - Class A ........................          1,543
  Distribution fees - Class B ........................          1,779
  Distribution fees - Class C ........................            918
  Shareholder services fees ..........................        190,093
  Shareholder communications expenses ................        116,460
  Legal and audit fees ...............................         83,401
  Custodian fees .....................................         52,702
  Registration fees ..................................         34,470
  Directors' fees ....................................         11,350
  Miscellaneous expenses .............................         91,373
                                                         ------------
  TOTAL EXPENSES .....................................      1,924,485
  Less: Custodian fee credits ........................           (865)
                                                         ------------
  NET EXPENSES .......................................      1,923,620
                                                         ------------
  NET INVESTMENT INCOME ..............................        110,182
                                                         ------------
NET REALIZED AND UNREALIZED GAIN (LOSS)
  ON INVESTMENTS AND FOREIGN CURRENCY:
  Net realized gain on investments ...................      9,247,834
  Net realized loss on foreign currency transactions .        (14,936)
  Net change in unrealized appreciation / depreciation
    on investments and foreign currency translations .      4,268,855
                                                         ------------
  NET REALIZED AND UNREALIZED GAIN (LOSS)
    ON INVESTMENTS AND FOREIGN CURRENCY ..............     13,501,753
                                                         ------------
  NET INCREASE IN NET ASSETS
    RESULTING FROM OPERATIONS ........................   $ 13,611,935
                                                         ============

                 See accompanying notes to financial statements.

                                       8


                          THE GAMCO GLOBAL GROWTH FUND


STATEMENT OF CHANGES IN NET ASSETS
================================================================================


                                                                         YEAR ENDED          YEAR ENDED
                                                                      DECEMBER 31, 2005   DECEMBER 31, 2004
                                                                      ----------------    -----------------
                                                                                      
OPERATIONS:
  Net investment income (loss) .....................................   $     110,182        $    (352,482)
  Net realized gain on investments and foreign currency transactions       9,232,898           14,399,556
  Net change in unrealized appreciation/depreciation on
     investments and foreign currency translations .................       4,268,855           (4,360,074)
                                                                       -------------        -------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS .............      13,611,935            9,687,000
                                                                       -------------        -------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income
    Class AAA ......................................................         (92,625)                  --
    Class A ........................................................          (2,247)                  --
                                                                       -------------        -------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS ..............................         (94,872)                  --
                                                                       -------------        -------------
CAPITAL SHARE TRANSACTIONS:
    Class AAA ......................................................     (18,980,399)         (28,502,375)
    Class A ........................................................         576,999               19,605
    Class B ........................................................          (3,817)             (43,097)
    Class C ........................................................         171,726             (163,342)
                                                                       -------------        -------------
  NET DECREASE IN NET ASSETS FROM CAPITAL SHARE TRANSACTIONS .......     (18,235,491)         (28,689,209)
                                                                       -------------        -------------
  REDEMPTION FEES ..................................................             873               11,158
                                                                       -------------        -------------
  NET DECREASE IN NET ASSETS .......................................      (4,717,555)         (18,991,051)
NET ASSETS:
  Beginning of period ..............................................     114,738,838          133,729,889
                                                                       -------------        -------------
  End of period (including undistributed net investment
      income of $374 and $0, respectively) .........................   $ 110,021,283        $ 114,738,838
                                                                       =============        =============


NOTES TO FINANCIAL STATEMENTS
================================================================================

1.  ORGANIZATION.  The GAMCO  Global  Growth Fund (the  "Fund"),  formerly,  The
Gabelli  Global Growth Fund, a series of GAMCO Global  Series  Funds,  Inc. (the
"Corporation"),  formerly,  Gabelli Global Series Funds,  Inc., was organized on
July 16, 1993 as a Maryland corporation.  The Fund is a non-diversified open-end
management  investment  company  registered under the Investment  Company Act of
1940, as amended (the "1940 Act"), and one of four separately managed portfolios
(collectively,   the  "Portfolios")  of  the  Corporation.  The  Fund's  primary
objective is capital  appreciation.  The Fund commenced investment operations on
February  7, 1994.  Prior to January 13,  2000,  the Fund's name was The Gabelli
Global Interactive Couch Potato(R) Fund.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance  with  U.S.  generally  accepted   accounting   principles   requires
management to make estimates and  assumptions  that affect the reported  amounts
and  disclosures in the financial  statements.  Actual results could differ from
those estimates.  The following is a summary of significant  accounting policies
followed by the Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange or traded in the U.S. over-the-counter market for
which market quotations are readily available are valued at the last quoted sale
price or a market's  official  closing  price as of the close of business on the
day the  securities  are being  valued.  If there  were no sales  that day,  the
security is valued at the  average of the  closing  bid and asked  prices or, if
there were no asked  prices  quoted on that day,  then the security is valued at
the closing bid price on that day. If no bid or asked  prices are quoted on such
day,  the  security is valued at the most  recently  available  price or, if the
Board of  Directors  (the  "Board") so  determines,  by such other method as the
Board shall determine in good faith, to reflect its fair market value. Portfolio
securities  traded on more than one national  securities  exchange or market are
valued according to the broadest and most  representative  market, as determined
by Gabelli Funds, LLC (the "Adviser").

                                       9


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

Portfolio securities primarily traded on foreign markets are generally valued at
the preceding closing values of such securities on their respective exchanges or
if after the close of the foreign markets, but prior to the close of business on
the day the securities are being valued, market conditions change significantly,
certain foreign securities may be fair valued pursuant to procedures established
by the Board. Debt instruments with remaining maturities of 60 days or less that
are not  credit  impaired  are  valued  at  amortized  cost,  unless  the  Board
determines  such amount does not reflect the  securities'  fair value,  in which
case these  securities  will be valued at their fair value as  determined by the
Board. Debt instruments  having a maturity greater than 60 days for which market
quotations are readily available are valued at the average of the latest bid and
asked prices.  If there were no asked prices quoted on such day, the security is
valued using the closing bid price.  Futures contracts are valued at the closing
settlement  price of the  exchange  or board  of trade on which  the  applicable
contract is traded.

Securities and assets for which market  quotations are not readily available are
valued  at their  fair  value  as  determined  in good  faith  under  procedures
established by and under the general  supervision  of the Board.  Fair valuation
methodologies  and procedures may include,  but are not limited to: analysis and
review of available  financial and non-financial  information about the company;
comparisons  to the  valuation  and changes in valuation of similar  securities,
including a comparison of foreign securities to the equivalent U.S. dollar value
ADR  securities at the close of the U.S.  exchange;  and evaluation of any other
information that could be indicative of the value of the security.

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit  guidelines  established  by the  Adviser  and  reviewed by the
Board.  Under  the  terms of a  typical  repurchase  agreement,  the Fund  takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2005, there were no open repurchase agreements.

FUTURES  CONTRACTS.  The Fund may engage in futures contracts for the purpose of
hedging  against  changes in the value of its  portfolio  securities  and in the
value of  securities  it  intends  to  purchase.  Upon  entering  into a futures
contract,  the Fund is required to deposit  with the broker an amount of cash or
cash equivalents equal to a certain  percentage of the contract amount.  This is
known as the "initial margin". Subsequent payments ("variation margin") are made
or  received by the Fund each day,  depending  on the daily  fluctuation  of the
value of the  contract.  The daily  changes  in the  contract  are  included  in
unrealized gains or losses. The Fund recognizes a realized gain or loss when the
contract is closed.

There are several  risks in  connection  with the use of futures  contracts as a
hedging  instrument.   The  change  in  value  of  futures  contracts  primarily
corresponds  with the  value  of their  underlying  instruments,  which  may not

                                       10


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

correlate with the change in value of the hedged investments. In addition, there
is the risk that the Fund may not be able to enter  into a  closing  transaction
because of an illiquid  secondary  market.  At December 31, 2005,  there were no
open futures contracts.

SECURITIES  SOLD SHORT. A short sale involves  selling a security which the Fund
does not own. The proceeds  received for short sales are recorded as liabilities
and the Fund records an unrealized  gain or loss to the extent of the difference
between the proceeds  received  and the value of the open short  position on the
day of  determination.  The Fund records a realized  gain or loss when the short
position is closed out. By entering into a short sale, the Fund bears the market
risk of an unfavorable change in the price of the security sold short. Dividends
on short sales are  recorded as an expense by the Fund on the  ex-dividend  date
and interest expense is recorded on the accrual basis. The Fund did not hold any
short positions as of December 31, 2005.

FORWARD  FOREIGN  EXCHANGE  CONTRACTS.  The Fund may engage in  forward  foreign
exchange contracts for hedging a specific transaction with respect to either the
currency in which the  transaction is denominated or another  currency as deemed
appropriate by the Adviser. Forward foreign exchange contracts are valued at the
forward  rate and are  marked-to-market  daily.  The  change in market  value is
included in  unrealized  appreciation/depreciation  on  investments  and foreign
currency translations.  When the contract is closed, the Fund records a realized
gain or loss equal to the  difference  between the value of the  contract at the
time it was opened and the value at the time it was closed.

The use of forward foreign exchange contracts does not eliminate fluctuations in
the underlying prices of the Fund's portfolio securities,  but it does establish
a rate of exchange that can be achieved in the future.  Although forward foreign
exchange  contracts  limit the risk of loss due to a decline in the value of the
hedged currency, they also limit any potential gain that might result should the
value of the currency increase. In addition,  the Fund could be exposed to risks
if the  counterparties  to the  contracts  are unable to meet the terms of their
contracts.  At December 31, 2005,  there were no open forward  foreign  exchange
contracts.

FOREIGN CURRENCY TRANSLATIONS.  The books and records of the Fund are maintained
in United States (U.S.)  dollars.  Foreign  currencies,  investments,  and other
assets and liabilities are translated into U.S.  dollars at the current exchange
rates.  Purchases and sales of investment  securities,  income, and expenses are
translated  at the exchange  rate  prevailing  on the  respective  dates of such
transactions.  Unrealized  gains and losses that result from  changes in foreign
exchange rates and/or changes in market prices of securities  have been included
in unrealized  appreciation/depreciation  on  investments  and foreign  currency
translations.  Net realized  foreign  currency  gains and losses  resulting from
changes in exchange  rates include  foreign  currency  gains and losses  between
trade date and settlement date on investment  securities  transactions,  foreign
currency  transactions,  and the difference  between the amounts of interest and
dividends  recorded on the books of the Fund and the amounts actually  received.
The  portion of foreign  currency  gains and losses  related to  fluctuation  in
exchange rates between the initial trade date and subsequent  sale trade date is
included in realized gain/(loss) on investments.

FOREIGN  SECURITIES.  The Fund  may  directly  purchase  securities  of  foreign
issuers.  Investing in securities of foreign issuers  involves special risks not
typically  associated  with investing in securities of U.S.  issuers.  The risks
include  possible  revaluation of currencies,  the ability to repatriate  funds,
less complete financial information about companies, and possible future adverse
political  and  economic  developments.  Moreover,  securities  of many  foreign
issuers and their markets may be less liquid and their prices more volatile than
those of securities of comparable U.S. issuers.

                                       11


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

FOREIGN  TAXES.  The Fund may be subject to  foreign  taxes on income,  gains on
investments or currency repatriation, a portion of which may be recoverable. The
Fund will accrue such taxes and recoveries as applicable, based upon its current
interpretation  of tax rules and regulations  that exist in the markets in which
it invests.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium and  accretion  of discount) is recorded on the accrual
basis.  Premiums  and  discounts  on debt  securities  are  amortized  using the
effective  yield  to  maturity  method.  Dividend  income  is  recorded  on  the
ex-dividend date except for certain  dividends which are recorded as soon as the
Fund is informed of the dividend.

DETERMINATION   OF  NET  ASSET  VALUE  AND  CALCULATION  OF  EXPENSES.   Certain
administrative  expenses are common to, and allocated among,  various affiliated
funds.  Such allocations are made on the basis of each Fund's average net assets
or other criteria  directly  affecting the expenses as determined by the Adviser
pursuant to procedures established by the Board.

In calculating  the net asset value ("NAV") per share of each class,  investment
income, realized and unrealized gains and losses,  redemption fees, and expenses
other than class specific expenses,  are allocated daily to each class of shares
based upon the  proportion  of net assets of each class at the beginning of each
day. Distribution expenses are borne solely by the class incurring the expense.

CUSTODIAN FEE CREDITS. When cash balances are maintained in the custody account,
the Fund receives  credits which are used to offset  custodian  fees.  The gross
expenses paid under the custody  arrangement  are included in custodian  fees in
the  Statement of  Operations  with the  corresponding  expense  offset shown as
"custodian fee credits".

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders are recorded on the ex-dividend date. Distributions to shareholders
are based on income and capital gains as  determined in accordance  with Federal
income tax  regulations,  which may differ  from  income  and  capital  gains as
determined  under  U.S.  generally   accepted   accounting   principles.   These
differences  are  primarily  due to differing  treatments of income and gains on
various  investment  securities and foreign  currency  transactions  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund. Distributions from net investment income include net realized gains
on  foreign  currency  transactions.   These  book/tax  differences  are  either
temporary or permanent in nature. To the extent these differences are permanent,
adjustments are made to the  appropriate  equity accounts in the period that the
differences arise. These reclassifications have no impact on the NAV of the Fund
and  the  calculation  of net  investment  income  per  share  in the  Financial
Highlights  excludes  these  adjustments.  For the year ended December 31, 2005,
reclassifications  were made to decrease  accumulated  net investment  income by
$14,936 and to decrease accumulated net realized loss on investments and foreign
currency transactions by $14,936.

The tax character of distributions  paid during the year ended December 31, 2005
was $94,872 of ordinary income. No distributions were made in 2004.

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended (the  "Code").  It is the policy of the Fund to comply with the
requirements  of the Code  applicable to regulated  investment  companies and to
distribute  substantially  all of its net investment  company taxable income and
net capital gains. Therefore, no provision for Federal income taxes is required.

                                       12


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

As of December 31, 2005, the components of  accumulated  earnings/(losses)  on a
tax basis were as follows:

         Undistributed ordinary income .............   $        374
         Capital loss carryforward .................    (68,172,627)
         Net unrealized appreciation on investments,
           currency and foreign receivables and
           payables ................................     21,623,728
                                                       ------------
         Total accumulated loss ....................   $(46,548,525)
                                                       ============

At December 31, 2005,  the Fund has net capital loss  carryforwards  for Federal
income  tax  purposes  of  $68,172,627,  which are  available  to reduce  future
required  distributions  of net capital gains to  shareholders.  $26,923,440  is
available through 2010; $39,969,419 is available through 2011; and $1,279,768 is
available  through 2012. For the year ended December 31, 2005, the Fund utilized
capital loss carryforwards of $9,035,254.

The following  summarizes  the tax cost of  investments  and related  unrealized
appreciation/depreciation at December 31, 2005:

                                         GROSS         GROSS      NET UNREALIZED
                                      UNREALIZED    UNREALIZED     APPRECIATION/
                            COST     APPRECIATION  DEPRECIATION   (DEPRECIATION)
                            ----     ------------  ------------   --------------
      Investments ..... $88,610,855  $23,113,451    $(1,488,191)   $21,625,260

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the  value of its  average  daily net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business and affairs,  and pays the  compensation  of all
Officers and Directors of the Fund who are affiliated persons of the Adviser.

4.  DISTRIBUTION  PLAN.  The Fund's Board has adopted a  distribution  plan (the
"Plan")  for each class of shares  pursuant  to Rule  12b-1  under the 1940 Act.
Gabelli & Company,  Inc.  ("Gabelli &  Company"),  an  affiliate of the Adviser,
serves as  distributor  of the Fund.  Under the Class AAA, Class A, Class B, and
Class C Share  Plans,  payments  are  authorized  to Gabelli & Company at annual
rates of 0.25%, 0.25%, 1.00%, and 1.00%, respectively,  of the average daily net
assets of those classes,  the annual  limitations under each Plan. Such payments
are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2005, other than short-term  securities,  aggregated
$35,281,286 and $52,384,851, respectively.

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2005, the
Fund paid brokerage  commissions  of $1,350 to Gabelli & Company.  Additionally,
Gabelli & Company  informed  the Fund that it  received  $3,397  from  investors
representing  commissions  (sales  charges and  underwriting  fees) on sales and
redemptions of Fund shares.

The cost of calculating  the Fund's NAV per share is a Fund expense  pursuant to
the Advisory  Agreement  between the Fund and the  Adviser.  During the the year
ended December 31, 2005, the Fund  reimbursed the Adviser  $45,000 in connection
with the cost of computing  the Fund's NAV,  which is included in  miscellaneous
expenses in the Statement of Operations.

                                       13


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

7. LINE OF CREDIT.  The Fund has access to an unsecured  line of credit of up to
$25,000,000  from the  custodian for temporary  borrowing  purposes.  Borrowings
under this  arrangement  bear  interest at 0.75% above the Federal Funds rate on
outstanding balances. At December 31, 2005, there were no borrowings outstanding
from the line of credit.

The  average  daily  amount of  borrowings  outstanding  from the line of credit
within the year ended  December  31,  2005,  was $7,167 with a weighted  average
interest rate of 3.30%.  The maximum amount borrowed at any time during the year
ended December 31, 2005 was $707,000.

8. CAPITAL STOCK TRANSACTIONS.  The Fund currently offers four classes of shares
- -- Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares. Class
AAA Shares are offered only to investors  who acquire them directly from Gabelli
& Company or through  selected  broker/dealers  without a sales charge.  Class A
Shares are subject to a maximum front-end sales charge of 5.75%.  Class B Shares
are subject to a contingent  deferred  sales  charge  ("CDSC")  upon  redemption
within  six  years  of  purchase  and  automatically  convert  to Class A Shares
approximately  eight years after the original  purchase.  The applicable CDSC is
equal to a declining  percentage  of the lesser of the NAV per share at the date
of the original  purchase or at the date of  redemption,  based on the length of
time held.  Class C Shares are subject to a 1% CDSC for one year after purchase.
Class B Shares are  available  only through  exchange of Class B Shares of other
funds  distributed  by Gabelli & Company.  The Board has approved Class I Shares
which have not been offered publicly.

Effective June 15, 2005, the Fund imposed a redemption fee of 2.00% on Class AAA
Shares,  Class A Shares, Class B Shares, and Class C Shares that are redeemed or
exchanged  on or before the seventh day after the date of a purchase.  (Prior to
June 15, 2005, the Fund imposed a redemption fee on shares that were redeemed or
exchanged  within the sixtieth day after the date of a purchase.) The redemption
fee  is  deducted  from  the  proceeds   otherwise   payable  to  the  redeeming
shareholders  and is retained by the Fund. The  redemption  fees retained by the
Fund during the years ended  December 31, 2005 and December 31, 2004 amounted to
$873 and $11,158, respectively.

The redemption fee does not apply to shares purchased  through programs that the
Adviser  determined to have  appropriate  short-term  trading policies in place.
Additionally,  certain recordkeepers for qualified and non-qualified  retirement
plans that could not collect the redemption fee at the participant  level due to
systems limitations have received an extension to implement such systems.

                                       14


THE GAMCO GLOBAL GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

Transactions in shares of capital stock were as follows:



                                                              YEAR ENDED                        YEAR ENDED
                                                           DECEMBER 31, 2005                 DECEMBER 31, 2004
                                                     ----------------------------      ----------------------------
                                                       SHARES          AMOUNT             SHARES         AMOUNT
                                                     ----------      ------------      ----------      ------------
                                                               CLASS AAA                         CLASS AAA
                                                     ----------------------------      ----------------------------
                                                                                           
Shares sold ........................................    351,247      $  6,634,577         303,833      $  4,973,892
Shares issued upon reinvestment of dividends .......      4,351            89,324              --                --
Shares redeemed .................................... (1,387,756)      (25,704,300)     (2,053,668)      (33,476,267)
                                                     ----------      ------------      ----------      ------------
  Net decrease ..................................... (1,032,158)     $(18,980,399)     (1,749,835)     $(28,502,375)
                                                     ==========      ============      ==========      ============

                                                                CLASS A                           CLASS A
                                                     ----------------------------      ----------------------------
Shares sold ........................................     36,708      $    724,402          18,166      $    291,654
Shares issued upon reinvestment of dividends .......         97             1,998              --                --
Shares redeemed ....................................     (7,903)         (149,401)        (16,659)         (272,049)
                                                     ----------      ------------      ----------      ------------
  Net increase .....................................     28,902      $    576,999           1,507      $     19,605
                                                     ==========      ============      ==========      ============

                                                                CLASS B                           CLASS B
                                                     ----------------------------      ----------------------------
Shares sold ........................................      1,074      $     18,953             207      $      3,080
Shares redeemed ....................................     (1,326)          (22,770)         (2,868)          (46,177)
                                                     ----------      ------------      ----------      ------------
  Net decrease .....................................       (252)     $     (3,817)         (2,661)     $    (43,097)
                                                     ==========      ============      ==========      ============

                                                                CLASS C                           CLASS C
                                                     ----------------------------      ----------------------------
Shares sold ........................................      9,486      $    178,993           4,553      $     69,965
Shares redeemed ....................................       (394)           (7,267)        (14,548)         (233,307)
                                                     ----------      ------------      ----------      ------------
  Net increase/(decrease) ..........................      9,092      $    171,726          (9,995)     $   (163,342)
                                                     ==========      ============      ==========      ============


9.  INDEMNIFICATIONS.  The Fund enters into  contracts that contain a variety of
indemnifications.  The Fund's  maximum  exposure  under  these  arrangements  is
unknown.  However, the Fund has not had prior claims or losses pursuant to these
contracts and expects the risk of loss to be remote.

10. OTHER MATTERS.  The Adviser and/or  affiliates have received  subpoenas from
the Attorney  General of the State of New York and the  Securities  and Exchange
Commission (the "SEC")  requesting  information on mutual fund trading practices
involving  certain  funds managed by the Adviser.  GAMCO  Investors,  Inc.,  the
Adviser's  parent  company,  is responding  to these  requests for documents and
testimony.  On a separate matter, in September 2005, the Adviser was informed by
the staff of the SEC that the  staff may  recommend  to the  Commission  that an
administrative  remedy and a  monetary  penalty  be sought  from the  Adviser in
connection  with the  actions of two of seven  closed-end  funds  managed by the
Adviser  relating  to  Section  19(a)  and Rule  19a-1 of the  1940  Act.  These
provisions require registered investment companies to provide written statements
to shareholders  when a dividend is made from a source other than net investment
income. While the two closed-end funds sent annual statements and provided other
materials containing this information, the funds did not send written statements
to shareholders  with each  distribution in 2002 and 2003. The Adviser  believes
that all of the funds are now in  compliance.  The Adviser  believes  that these
matters would have no effect on the Fund or any material  adverse  effect on the
Adviser or its ability to manage the Fund.

                                       15



THE GAMCO GLOBAL GROWTH FUND
FINANCIAL HIGHLIGHTS
================================================================================

Selected data for a share of capital stock outstanding throughout each period:



                            INCOME FROM INVESTMENT OPERATIONS           DISTRIBUTIONS
                          -------------------------------------   --------------------------
                                          Net
              Net Asset       Net     Realized and      Total
   Period       Value,    Investment   Unrealized       from         Net
   Ended      Beginning     Income   Gain (Loss) on  Investment   Investments      Total     Redemption
December 31,  of Period    (Loss)(c)   Investments   Operations     Income     Distributions   Fees(c)
- ------------  ---------    --------    -----------   ----------     ------     -------------   -------
                                                                          
CLASS AAA
  2005          $17.98      $ 0.02       $ 2.45        $ 2.47      $(0.02)        $(0.02)      $0.00(a)
  2004           16.43       (0.05)        1.60          1.55          --             --        0.00(a)
  2003           11.62       (0.06)        4.86          4.80          --             --        0.01
  2002           15.45       (0.08)       (3.75)        (3.83)         --             --          --
  2001           20.37       (0.16)       (4.76)        (4.92)         --             --          --
CLASS A
  2005          $18.01      $ 0.01       $ 2.45        $ 2.46      $(0.04)        $(0.04)      $0.00(a)
  2004           16.45       (0.05)        1.61          1.56          --             --        0.00(a)
  2003           11.63       (0.06)        4.87          4.81          --             --        0.01
  2002           15.47       (0.08)       (3.76)        (3.84)         --             --          --
  2001           20.37       (0.16)       (4.74)        (4.90)         --             --          --
CLASS B
  2005          $17.41      $(0.12)      $ 2.36        $ 2.24          --             --       $0.00(a)
  2004           16.02       (0.17)        1.56          1.39          --             --        0.00(a)
  2003           11.42       (0.16)        4.75          4.59          --             --        0.01
  2002           15.30       (0.17)       (3.71)        (3.88)         --             --          --
  2001           20.30       (0.29)       (4.71)        (5.00)         --             --          --
CLASS C
  2005          $17.35      $(0.16)      $ 2.39        $ 2.23          --             --       $0.00(a)
  2004           15.97       (0.19)        1.57          1.38          --             --        0.00(a)
  2003           11.38       (0.16)        4.74          4.58          --             --        0.01
  2002           15.26       (0.17)       (3.71)        (3.88)         --             --          --
  2001           20.24       (0.28)       (4.70)        (4.98)         --             --          --



                               RATIOS TO AVERAGE NET ASSETS/SUPPLEMENTAL DATA
                        ----------------------------------------------------------

              Net Asset           Net Assets     Net
   Period      Value,               End of   Investment                 Portfolio
   Ended       End of    Total      Period     Income     Operating     Turnover
December 31,   Period   Return+   (in 000's)   (Loss)    Expenses (b)     Rate
- ------------   -------  -------   ----------   ------    -------------  --------
                                                       
CLASS AAA
  2005         $20.43     13.7%    $108,433      0.11%      1.79%(d)       33%
  2004          17.98      9.4      114,011     (0.30)      1.82          100
  2003          16.43     41.4      132,886     (0.45)      1.71           63
  2002          11.62    (24.8)     105,034     (0.58)      1.75           82
  2001          15.45    (24.2)     178,575     (0.91)      1.75          102
CLASS A
  2005         $20.43     13.7%    $  1,150      0.03%      1.79%(d)       33%
  2004          18.01      9.5          493     (0.29)      1.82          100
  2003          16.45     41.4          426     (0.45)      1.71           63
  2002          11.63    (24.8)         176     (0.58)      1.75           82
  2001          15.47    (24.1)         163     (0.91)      1.75          102
CLASS B
  2005         $19.65     12.9%    $    202     (0.67)%     2.54%(d)       33%
  2004          17.41      8.7          183     (1.05)      2.57          100
  2003          16.02     40.3          211     (1.20)      2.46           63
  2002          11.42    (25.4)          86     (1.33)      2.50           82
  2001          15.30    (24.6)          57     (1.66)      2.50          102
CLASS C
  2005         $19.58     12.9%    $    236     (0.90)%     2.52%(d)       33%
  2004          17.35      8.6           52     (1.17)      2.57          100
  2003          15.97     40.3          207     (1.20)      2.46           63
  2002          11.38    (25.4)         101     (1.33)      2.50           82
  2001          15.26    (24.6)          55     (1.66)      2.50          102


- -------------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including  reinvestment of dividends and does not reflect  applicable  sales
    charges.
(a) Amount represents less than $0.005 per share.
(b) The Fund incurred interest expense during the years ended December 31, 2004,
    2002,  and 2001. If interest  expense had not been  incurred,  the ratios of
    operating  expenses to average net assets would have been 1.81%,  1.70%, and
    1.59% (Class AAA),  1.81%,  1.70%, and 1.59%,  (Class A), 2.56%,  2.45%, and
    2.34% (Class B), and 2.56%, 2.45%, and 2.34% (Class C), respectively.
(c) Per share amounts have been calculated using the average shares  outstanding
    method.
(d) The ratios do not include a reduction of expenses for  custodian fee credits
    on cash balances maintained with the custodian. Including such custodian fee
    credits,  the expense ratios for the year ended December 31, 2005 would have
    been 1.79%,  1.79%,  2.53%,  and 2.52% for Class AAA,  Class A, Class B, and
    Class C, respectively.

                 See accompanying notes to financial statements.

                                       16


THE GAMCO GLOBAL GROWTH FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Directors of
GAMCO Global Series Funds, Inc.

We have audited the accompanying statement of assets and liabilities,  including
the  schedule of  investments,  of The GAMCO  Global  Growth  Fund (the  "Fund")
(formerly  The Gabelli  Global  Growth  Fund),  a series of GAMCO Global  Series
Funds,  Inc.,  (formerly  Gabelli Global Series Funds,  Inc.) as of December 31,
2005,  and the related  statement  of  operations  for the year then ended,  the
statements of changes in net assets for each of the two years in the period then
ended,  and the financial  highlights  for each of the three years in the period
then  ended.  These  financial  statements  and  financial  highlights  are  the
responsibility  of the Fund's  management.  Our  responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audits.  The financial  highlights for each of the two years in the period ended
December 31, 2002 were audited by other  auditors whose report dated January 31,
2003, expressed an unqualified opinion on those financial highlights.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material  misstatement.  We were
not engaged to perform an audit of the Fund's  internal  control over  financial
reporting.  Our audits included consideration of internal control over financial
reporting as a basis for designing audit  procedures that are appropriate in the
circumstances,  but  not  for  the  purpose  of  expressing  an  opinion  on the
effectiveness  of  the  Fund's  internal   control  over  financial   reporting.
Accordingly,  we express no such opinion. An audit also includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements and financial  highlights,  assessing the accounting  principles used
and  significant  estimates  made by  management,  and  evaluating  the  overall
financial  statement  presentation.  Our  procedures  included  confirmation  of
securities  owned as of December 31,  2005,  by  correspondence  with the Fund's
custodian.  We  believe  that our  audits  provide  a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of The
GAMCO  Global  Growth  Fund, a series of GAMCO Global  Series  Funds,  Inc.,  at
December 31, 2005, the results of its  operations  for the year then ended,  the
changes in its net assets  for each of the two years in the period  then  ended,
and the  financial  highlights  for each of the three  years in the period  then
ended, in conformity with U.S. generally accepted accounting principles.

                                                               /s/ Ernst & Young

Philadelphia, Pennsylvania
February 14, 2006

                                       17


                          THE GAMCO GLOBAL GROWTH FUND

BOARD CONSIDERATION AND RE-APPROVAL OF INVESTMENT ADVISORY AGREEMENT (UNAUDITED)

During the six months ended  December  31,  2005,  the Board of Directors of the
Corporation  approved the continuation of the investment advisory agreement with
the Adviser  for the Fund on the basis of the  recommendation  by the  directors
(the "independent  directors") who are not "interested persons" of the Fund. The
following  paragraphs  summarize the material information and factors considered
by the  independent  directors  as well as their  conclusions  relative  to such
factors.

NATURE,  EXTENT AND QUALITY OF SERVICES.  The independent  directors  considered
information  regarding  the  portfolio  managers,  the depth of the analyst pool
available   to  the  Adviser   and  the   portfolio   managers,   the  scope  of
administrative,  shareholder,  and other services  supervised or provided by the
Adviser,  and the absence of significant service problems reported to the Board.
The  independent  directors  noted  the  experience,   length  of  service,  and
reputation of the portfolio managers.

INVESTMENT  PERFORMANCE.  The independent  directors reviewed the short, medium,
and long-term  performance of the Fund against a peer group of global  multi-cap
core and global multi-cap growth funds, noting its top third performance for the
one and three year  periods and bottom  quartile  performance  for the five year
period.

PROFITABILITY.  The independent  directors  reviewed  summary data regarding the
profitability  of the Fund to the  Adviser  both with a pro rata  administrative
overhead charge and with a standalone  administrative charge. The directors also
noted an affiliated  broker of the Adviser received  distribution fees and minor
amounts of sales commissions.

ECONOMIES OF SCALE.  The independent  directors  discussed the major elements of
the Adviser's cost structure and the relationship of those elements to potential
economies of scale and reviewed  rudimentary  data suggesting that 20% growth in
the Fund would not produce  meaningful  economies of scale that the shareholders
would not participate in.

SHARING  OF  ECONOMIES  OF  SCALE.  The  independent  directors  noted  that the
investment  advisory  fee  schedule  for the Fund does not take into account any
potential economies of scale that may develop.

SERVICE AND COST  COMPARISONS.  The independent  directors  compared the expense
ratios of the investment advisory fee, other expenses, and total expenses of the
Fund to similar  expense  ratios of the peer group of global  multi-cap core and
multi-cap  growth  funds and noted  that the  Adviser's  advisory  fee  includes
substantially  all  administrative  services  of the Fund as well as  investment
advisory  services.  The  directors  noted that the Fund's  expense  ratios were
significantly  higher,  and the Fund's size was lower,  than average within this
group.  The directors also noted that the advisory fee structure was the same as
that in effect for most of the Gabelli/GAMCO funds. The directors were presented
with,  but did not  compare,  the  advisory  fee to the fee for  other  types of
accounts managed by the Adviser.

CONCLUSIONS.  The independent  directors  concluded that the Fund enjoyed highly
experienced portfolio management services,  good ancillary services, and a mixed
performance  record.  The  independent  directors also concluded that the Fund's
expense  ratios and the  profitability  to the Adviser of managing the Fund were
reasonable,  and that economies of scale were not a significant  factor in their
thinking at this time. The directors did not view the potential profitability of
ancillary services as material to their decision.  On the basis of the foregoing
and  without  assigning   particular  weight  to  any  single  conclusion,   the
independent  directors  determined to recommend  continuation  of the investment
advisory agreement to the full Board of Directors.

                                       18



THE GAMCO GLOBAL GROWTH FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================

The business and affairs of the Company are managed  under the  direction of the
Company's  Board of  Directors.  Information  pertaining  to the  Directors  and
officers of the Company is set forth below.  The Fund's  Statement of Additional
Information includes additional information about The GAMCO Global Growth Fund's
Directors and is available, without charge, upon request, by calling 800-GABELLI
(800-422-3554)  or by writing to The GAMCO Global  Growth Fund at One  Corporate
Center, Rye, NY 10580-1422.



                         TERM OF        NUMBER OF
                       OFFICE AND     FUNDS IN FUND
NAME, POSITION(S)       LENGTH OF        COMPLEX
    ADDRESS 1              TIME         OVERSEEN BY       PRINCIPAL OCCUPATION(S)              OTHER DIRECTORSHIPS
    AND AGE              SERVED 2        DIRECTOR         DURING PAST FIVE YEARS                HELD BY DIRECTOR 4
- ----------------         --------       ----------        ----------------------                ------------------
                                                                                     
INTERESTED DIRECTORS 3:
- ----------------------
MARIO J. GABELLI       Since 1993          24     Chairman of the Board and Chief Executive      Director of Morgan Group
Director and                                      Officer of GAMCO Investors, Inc.               Holdings, Inc.
Chief Investment Officer                          and Chief Investment Officer - Value           (holding company)
Age: 63                                           Portfolios of Gabelli Funds, LLC and
                                                  GAMCO Asset Management Inc.; Chairman and
                                                  Chief Executive Officer of Lynch
                                                  Interactive Corporation (multimedia and
                                                  services)

JOHN D. GABELLI        Since 1993          10     Senior Vice President of Gabelli & Company,    Director of GAMCO
Director                                          Inc.                                           Investors, Inc.
Age: 61

NON-INTERESTED DIRECTORS:
- ------------------------
E. VAL  CERUTTI        Since 2001           7     Chief Executive Officer of Cerutti             Director of Lynch Corporation
Director                                          Consultants, Inc.; Adviser,                    (diversified manufacturing)
Age: 66                                           Iona College School of Business

ANTHONY J. COLAVITA    Since 1993          34     Partner in the law firm of                       --
Director                                          Anthony J. Colavita, P.C.
Age: 70

ARTHUR V. FERRARA      Since 2001           6     Formerly, Chairman of the Board and Chief      Director/Trustee of
Director                                          Executive Officer of The Guardian Life         25 mutual funds within the
Age: 75                                           Insurance Company of America from January      Guardian Fund Complex
                                                  1993 to December 1995; President, Chief
                                                  Executive Officer and a Director prior thereto

WERNER J. ROEDER, MD   Since 1993          23     Medical Director of Lawrence                     --
Director                                          Hospital and practicing private physician
Age: 65

ANTHONIE C. VAN EKRIS  Since 1993          18     Chairman of BALMAC International, Inc.           --
Director                                          (commodities and futures trading)
Age: 71

SALVATORE J. ZIZZA     Since 2004          25     Chairman of Hallmark Electrical                Director of Hollis-Eden
Director                                          Supplies Corp.                                 Pharmaceuticals (biotechnology);
Age: 60                                                                                          Director of Earl Scheib, Inc.
                                                                                                 (automotive services)

                                             19


THE GAMCO GLOBAL GROWTH FUND
ADDITIONAL FUND INFORMATION (UNAUDITED) (CONTINUED)
================================================================================



                         TERM OF
                       OFFICE AND
NAME, POSITION(S)       LENGTH OF
    ADDRESS 1              TIME                 PRINCIPAL OCCUPATION(S)
    AND AGE              SERVED 2               DURING PAST FIVE YEARS
- ----------------         --------               ----------------------
                                          
OFFICERS:
- --------
BRUCE N. ALPERT        Since 2003               Executive Vice President and Chief Operating
President                                       Officer of Gabelli Funds, LLC since 1988 and
and Treasurer                                   an officer of all of the registered investment
Age: 54                                         companies in the Gabelli Funds complex.
                                                Director and President of Gabelli Advisers, Inc.
                                                since 1998.

JAMES E. MCKEE         Since 1995               Vice President, General Counsel and Secretary of
Secretary                                       GAMCO Investors, Inc. since 1999 and GAMCO
Age: 42                                         Asset Management Inc. since 1993; Secretary
                                                of all of the registered investment companies
                                                in the Gabelli Funds complex.

PETER D. GOLDSTEIN     Since 2004               Director of Regulatory Affairs for GAMCO Investors, Inc.
Chief Compliance Officer                        since 2004; Chief Compliance Officer of all of the
Age: 52                                         registered investment companies in the Gabelli Funds
                                                complex; Vice President of Goldman Sachs Asset Management
                                                from 2000 through 2004.


- --------------
 1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
 2 Each Director  will hold office for an indefinite  term until the earliest of
   (i) the next  meeting of  shareholders,  if any,  called  for the  purpose of
   considering  the  election  or  re-election  of such  Director  and until the
   election and  qualification of his or her successor,  if any, elected at such
   meeting,  or (ii) the date a Director  resigns or  retires,  or a Director is
   removed by the Board of Directors or  shareholders,  in  accordance  with the
   Company's  By-Laws and  Articles of  Incorporation.  Each  officer  will hold
   office for an indefinite  term until the date he or she resigns or retires or
   until his or her successor is elected and qualified.  Effective  November 16,
   2005, Mr. Karl Otto Pohl resigned from the Board of Directors  and now serves
   as Director Emeritus.
 3 "Interested  person" of the Company as defined in the Investment  Company Act
   of 1940. Messrs. M. Gabelli and J. Gabelli are each considered an "interested
   person" because of their  affiliation  with Gabelli Funds,  LLC which acts as
   the Company's  investment  adviser.  Mario J. Gabelli and John D. Gabelli are
   brothers.
 4 This column includes only  directorships  of companies  required to report to
   the SEC under the Securities  Exchange Act of 1934 (i.e. public companies) or
   other investment companies registered under the 1940 Act.

- --------------------------------------------------------------------------------
                   2005 TAX NOTICE TO SHAREHOLDERS (Unaudited)

   For the fiscal year ended  December 31, 2005,  the Fund paid to  shareholders
   ordinary  income  dividends  (comprised of net  investment  income)  totaling
   $0.0174 and $0.0400  per share for Class AAA and Class A,  respectively.  For
   the year ended December 31, 2005, 100% of the distribution  qualifies for the
   dividend  received  deduction  available  to  corporations,  and  100% of the
   ordinary income distribution was qualified dividend income.
- --------------------------------------------------------------------------------

                                       20



- --------------------------------------------------------------------------------
     GABELLI FUNDS AND YOUR PERSONAL PRIVACY
================================================================================

     WHO ARE WE?
     The Gabelli Funds are investment  companies  registered with the Securities
     and Exchange  Commission  under the Investment  Company Act of 1940. We are
     managed  by  Gabelli  Funds,  LLC and  Gabelli  Advisers,  Inc.,  which are
     affiliated with GAMCO Investors,  Inc. GAMCO Investors,  Inc. is a publicly
     held company that has  subsidiaries  that  provide  investment  advisory or
     brokerage services for a variety of clients.

     WHAT KIND OF NON-PUBLIC INFORMATION DO WE COLLECT ABOUT YOU IF YOU BECOME A
     GABELLI  CUSTOMER?
     If you apply to open an  account  directly  with us,  you will be giving us
     some non-public  information about yourself.  The non-public information we
     collect about you is:

     o  INFORMATION  YOU GIVE US ON YOUR  APPLICATION  FORM.  This could include
        your name,  address,  telephone  number,  social security  number,  bank
        account number, and other information.

     o  INFORMATION  ABOUT YOUR  TRANSACTIONS WITH US, ANY TRANSACTIONS WITH OUR
        AFFILIATES,  AND  TRANSACTIONS  WITH  THE  ENTITIES  WE HIRE TO  PROVIDE
        SERVICES TO YOU.  This would include  information  about the shares that
        you buy or redeem, and the deposits and withdrawals that you make. If we
        hire someone else to provide  services--like  a transfer  agent--we will
        also have information  about the  transactions  that you conduct through
        them.

     WHAT INFORMATION DO WE DISCLOSE AND TO WHOM DO WE DISCLOSE IT?
     We do not disclose any non-public personal  information about our customers
     or former  customers  to anyone   other than our  affiliates   our  service
     providers who need to know such information,  and as otherwise permitted by
     law. If you want to find out what the law permits, you can read the privacy
     rules adopted by the Securities and Exchange Commission. They are in volume
     17 of the Code of Federal Regulations, Part 248. The Commission often posts
     information about its regulations on its web site, www.sec.gov.

     WHAT DO WE DO TO PROTECT YOUR PERSONAL INFORMATION?
     We restrict  access to  non-public  personal  information  about you to the
     people who need to know that  information  in order to provide  services to
     you or the Fund and to ensure that we are complying with the laws governing
     the securities business. We maintain physical,  electronic,  and procedural
     safeguards to keep your personal information confidential.
- --------------------------------------------------------------------------------


                             GABELLI FAMILY OF FUNDS

VALUE ________________________________________
GABELLI ASSET FUND
Seeks to invest primarily in a diversified portfolio of common stocks selling at
significant  discounts  to  their  private  market  value.  The  Fund's  primary
objective is growth of capital. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI BLUE CHIP VALUE FUND
Seeks long term growth of capital  through  investment  primarily  in the common
stocks of established  companies which are temporarily out of favor.  The fund's
objective  is to  identify a catalyst or sequence of events that will return the
company to a higher value.
(MULTICLASS)                              PORTFOLIO MANAGER: BARBARA MARCIN, CFA

WESTWOOD EQUITY FUND
Seeks to invest  primarily in the common stock of  well-seasoned  companies that
have  recently  reported  positive  earnings  surprises  and are  trading  below
Westwood's  proprietary  growth rate estimates.  The Fund's primary objective is
capital appreciation.
(MULTICLASS)                                   PORTFOLIO MANAGER: SUSAN M. BYRNE

FOCUSED VALUE ______________________________
GABELLI VALUE FUND
Seeks to invest in  securities  of  companies  believed to be  undervalued.  The
Fund's primary objective is long-term capital appreciation. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

SMALL CAP VALUE ____________________________
GABELLI SMALL CAP FUND
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  less  than $1  billion)  believed  to have  rapid  revenue  and
earnings growth potential. The Fund's primary objective is capital appreciation.
(MULTICLASS)                            PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD SMALLCAP EQUITY FUND
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $2.5 billion or less. The Fund's primary  objective is long-term capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GABELLI WOODLAND SMALL CAP VALUE FUND
Seeks to invest  primarily  in the common  stocks of smaller  companies  (market
capitalizations  less  than  $1.5  billion)  believed  to  be  undervalued  with
shareholder  oriented management teams that are employing strategies to grow the
company's  value.  The  Fund's  primary   objective  is  capital   appreciation.
(MULTICLASS)                          PORTFOLIO MANAGER: ELIZABETH M. LILLY, CFA

GROWTH ______________________________________
GAMCO GROWTH FUND
Seeks to invest  primarily in large cap stocks believed to have  favorable,  yet
undervalued,  prospects for earnings  growth.  The Fund's  primary  objective is
capital appreciation. (MULTICLASS)        PORTFOLIO MANAGER: HOWARD F. WARD, CFA

GAMCO INTERNATIONAL GROWTH FUND
Seeks to invest in the equity  securities  of  foreign  issuers  with  long-term
capital   appreciation    potential.    The   Fund   offers   investors   global
diversification. (MULTICLASS)                    PORTFOLIO MANAGER: CAESAR BRYAN

AGGRESSIVE GROWTH _________________________
GAMCO GLOBAL GROWTH FUND
Seeks capital appreciation through a disciplined  investment program focusing on
the globalization and interactivity of the world's marketplace. The Fund invests
in  companies  at the  forefront  of  accelerated  growth.  The  Fund's  primary
objective is capital appreciation. (MULTICLASS)                     TEAM MANAGED

MICRO-CAP ___________________________________
WESTWOOD MIGHTY MITES(SM) FUND
Seeks to invest in micro-cap companies that have market  capitalizations of $300
million or less. The Fund's primary objective is long-term capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

EQUITY INCOME _______________________________
GABELLI EQUITY INCOME FUND
Seeks to invest primarily in equity securities with above market average yields.
The Fund pays monthly  dividends  and seeks a high level of total return with an
emphasis on income. (MULTICLASS)        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD BALANCED FUND
Seeks to invest in a balanced and diversified portfolio of stocks and bonds. The
Fund's primary objective is both capital appreciation and current income.
(MULTICLASS)                            CO-PORTFOLIO MANAGERS: SUSAN M. BYRNE
                                                               MARK FREEMAN, CFA

WESTWOOD INCOME FUND
Seeks to  provide   a high level of  current income as well as long-term capital
appreciation  by  investing  in   income   producing  equity  and  fixed  income
securities. (MULTICLASS)                       PORTFOLIO MANAGER: SUSAN M. BYRNE

SPECIALTY EQUITY ____________________________
GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
Seeks to invest  principally in bonds and preferred stocks which are convertible
into  common  stock of  foreign  and  domestic  companies.  The  Fund's  primary
objective is total return  through a combination  of current  income and capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GAMCO GLOBAL OPPORTUNITY FUND
Seeks to invest in common stock of companies which have rapid growth in revenues
and  earnings  and  potential  for above  average  capital  appreciation  or are
undervalued. The Fund's primary objective is capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

SECTOR ______________________________________
GAMCO GLOBAL TELECOMMUNICATIONS FUND
Seeks to invest in telecommunications companies throughout the world - targeting
undervalued  companies with strong  earnings and cash flow dynamics.  The Fund's
primary objective is capital appreciation. (MULTICLASS)             TEAM MANAGED

GAMCO GOLD FUND
Seeks to invest in a global  portfolio of equity  securities  of gold mining and
related  companies.  The Fund's  objective  is long-term  capital  appreciation.
Investment in gold stocks is considered speculative and is affected by a variety
of world-wide economic, financial, and political factors. (MULTICLASS)
                                                 PORTFOLIO MANAGER: CAESAR BRYAN

GABELLI UTILITIES FUND
Seeks to provide a high level of total return  through a combination  of capital
appreciation and current income. (MULTICLASS)                       TEAM MANAGED

MERGER AND ARBITRAGE _____________________
GABELLI ABC FUND
Seeks to invest in securities with attractive  opportunities for appreciation or
investment  income.  The Fund's  primary  objective  is total  return in various
market conditions without excessive risk of capital loss.
(NO-LOAD)                               PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

CONTRARIAN_________________________________
GAMCO MATHERS FUND
Seeks  long-term  capital  appreciation  in various  market  conditions  without
excessive risk of capital loss. (CLASS AAA-NO-LOAD)
                                        PORTFOLIO MANAGER: HENRY VAN DER EB, CFA

COMSTOCK CAPITAL VALUE FUND
Seeks capital  appreciation and current income.  The Fund may use either long or
short positions to achieve its objective.
(MULTICLASS)                               PORTFOLIO MANAGER: MARTIN WEINER, CFA

COMSTOCK STRATEGY FUND
The Fund emphasizes investments in debt securities,  which maximize total return
in light of credit risk,  interest rate risk, and the risk  associated  with the
length of maturity of the debt instrument. (MULTICLASS)
                                           PORTFOLIO MANAGER: MARTIN WEINER, CFA

FIXED INCOME ________________________________
WESTWOOD INTERMEDIATE BOND FUND
Seeks to invest in a diversified portfolio of bonds with various maturities. The
Fund's primary objective is total return.
(MULTICLASS)                                PORTFOLIO MANAGER: MARK FREEMAN, CFA

CASH MANAGEMENT-MONEY MARKET __________
GABELLI U.S. TREASURY MONEY MARKET FUND
Seeks to invest exclusively in short-term U.S. Treasury  securities.  The Fund's
primary  objective  is to  provide  high  current  income  consistent  with  the
preservation of principal and liquidity. (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI

AN INVESTMENT IN THE ABOVE MONEY MARKET FUND  IS NEITHER  INSURED NOR GUARANTEED
BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT AGENCY.  ALTHOUGH
THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR  INVESTMENT AT $1.00 PER SHARE,  IT
IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND.

THE GLOBAL FUNDS INVEST IN FOREIGN SECURITIES WHICH INVOLVE RISKS NOT ORDINARILY
ASSOCIATED WITH INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING CURRENCY FLUCTUATION,
ECONOMIC, AND POLITICAL RISKS.

 TO RECEIVE A PROSPECTUS, CALL 800-GABELLI (422-3554). INVESTORS SHOULD CONSIDER
THE INVESTMENT OBJECTIVES, RISKS, AND CHARGES AND EXPENSES OF THE FUND CAREFULLY
       BEFORE INVESTING. THE PROSPECTUS CONTAINS MORE COMPLETE INFORMATION
   ABOUT THIS AND OTHER MATTERS AND SHOULD BE READ CAREFULLY BEFORE INVESTING.



                         GAMCO Global Series Funds, Inc.
                          THE GAMCO GLOBAL GROWTH FUND
                              One Corporate Center
                            Rye, New York 10580-1422
                                   800-GABELLI
                                  800-422-3554
                                FAX: 914-921-5118
                            WEBSITE: WWW.GABELLI.COM
                            E-MAIL: INFO@GABELLI.COM
                   Net Asset Value available daily by calling
                           800-GABELLI after 6:00 P.M.

                               BOARD OF DIRECTORS

Mario J. Gabelli, CFA                             John D. Gabelli
CHAIRMAN AND CHIEF                                SENIOR VICE PRESIDENT
EXECUTIVE OFFICER                                 GABELLI & COMPANY, INC.
GAMCO INVESTORS, INC.

E. Val Cerutti                                    Werner J. Roeder, MD
CHIEF EXECUTIVE OFFICER                           MEDICAL DIRECTOR
CERUTTI CONSULTANTS, INC.                         LAWRENCE HOSPITAL

Anthony J. Colavita                               Anthonie C. van Ekris
ATTORNEY-AT-LAW                                   MANAGING DIRECTOR
ANTHONY J. COLAVITA, P.C.                         BALMAC INTERNATIONAL, INC.

Arthur V. Ferrara                                 Salvatore J. Zizza
FORMER CHAIRMAN AND                               CHAIRMAN
CHIEF EXECUTIVE OFFICER                           HALLMARK ELECTRICAL
GUARDIAN LIFE INSURANCE                           SUPPLIES CORP.
COMPANY OF AMERICA

                                    OFFICERS

Bruce N. Alpert                                   James E. McKee
PRESIDENT AND TREASURER                           SECRETARY

Peter D. Goldstein
CHIEF COMPLIANCE OFFICER

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP


- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
GAMCO Global Growth Fund. It is not authorized  for  distribution to prospective
investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB442Q405SR


                                                                 GAMCO


                                                               THE
                                                               GAMCO
                                                               GLOBAL
                                                               GROWTH
                                                               FUND



                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2005

                        THE GAMCO GLOBAL OPPORTUNITY FUND

                                  ANNUAL REPORT
                                DECEMBER 31, 2005



TO OUR SHAREHOLDERS,

      The Sarbanes-Oxley Act requires a Fund's principal executive and financial
officers  to  certify  the  entire   contents  of  the  semi-annual  and  annual
shareholder  reports in a filing with the Securities and Exchange  Commission on
Form N-CSR. This certification  would cover the portfolio  manager's  commentary
and  subjective  opinions  if they are  attached  to or a part of the  financial
statements. Many of these comments and opinions would be difficult or impossible
to certify.

      Because we do not want our portfolio  managers to eliminate their opinions
and/or  restrict their  commentary to historical  facts, we have separated their
commentary from the financial  statements and investment portfolio and have sent
it to  you  separately.  Both  the  commentary  and  the  financial  statements,
including  the  portfolio  of  investments,  will be available on our website at
www.gabelli.com/funds.

      Enclosed are the audited financial statements and the investment portfolio
as of  December  31,  2005 with a  description  of  factors  that  affected  the
performance during the past year.

PERFORMANCE DISCUSSION

      For 2005, The GAMCO Global  Opportunity Fund returned 15.12% compared with
a rise of 11.37% for the MSCI AC World  Free  Index and  11.60% for the  average
Global Multi Cap Growth Fund monitored by Lipper.

      The  Japanese  equity  market  was  rerated  in 2005.  This was  driven by
institutional  foreign  investors who purchased  (Y)10 trillion of stock in 2005
and also by  individual  investors who bought (Y)2 trillion of stock in the past
three months. Japan was the top performer among leading non-U.S. equity markets.
Again  smaller  companies  outperformed  with the  TOPIX  second  section  index
rallying 41.9% in 2005.

      The U.S.  economy  continues  to perform well despite the presence of some
stiff  headwinds.  These include higher energy prices  following the devastating
gulf  coast  hurricanes  and the  tightening  of  monetary  policy.  The  dollar
benefited  during the past year from strong  inflows  from  overseas  investors,
which had a negative impact on the dollar denominated return of the Fund.

      Clearly,  the European story does not revolve around growth.  Rather it is
based on corporate self help.  Corporate  managers are acutely aware of the need
to create  shareholder  value,  as Europe has become the center of global merger
and acquisition activity in 2005.

      Mining holdings and gold miners in particular had an outstanding 2005 with
Antofagasta  plc up 67.2%,  followed by Harmony  Gold Mining Co. Ltd.  (+65.8%),
Gold Fields  Ltd.  (+41.2%),  and Newmont  Mining  Corp.  (+20.2%).  Another top
performing  sector  in our  portfolio  during  the  last  year  was  energy  and
utilities.  Among the best performing  energy and utility companies in 2005 were
Petrobras Brasiliero  (+79.16%),  Suncor Energy Inc. (+78.33%),  Transocean Inc.
(+64.40%),  Schlumberger Ltd.  (+45.11%),  and Kanto Natural Gas Development Co.
Ltd. (+35.5%).  Telecommunications  and entertainment  holdings  disappointed in
2005 with Telephone & Data Systems Inc. down by over 50%, Verizon Communications
Inc. declining by 25.7% and Time Warner Inc. (-10.3)%. The Fund's performance in
2005 was helped by its  exposure to Japan and Europe  while most of its domestic
holdings disappointed in the past twelve months.

                                                           Sincerely yours,

                                                           /s/ Bruce N. Alpert

                                                           Bruce N. Alpert
                                                           President
February 15, 2006


                               [GRAPHIC OMITTED]
                              PLOT POINTS FOLLOW:


   COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN THE GAMCO GLOBAL
   OPPORTUNITY FUND CLASS AAA SHARES, THE LIPPER GLOBAL MULTI-CAP GROWTH FUND
                    AVERAGE AND THE MSCI AC WORLD FREE INDEX

               GAMCO Global
             Opportunity Fund   Lipper Global Multi-Cap    MSCI AC World
             Class AAA Shares     Growth Fund Average        Free Index
5/11/98           $10,000              $10,000                 $10,000
12/31/98           11,010                9,922                  10,613
12/31/99           19,731               13,502                  13,459
12/31/00           17,069               12,115                  11,583
12/31/01           12,131               10,011                   9,740
12/31/02           10,738                8,056                   7,892
12/31/03           14,756               10,641                  10,624
12/31/04           16,823               12,194                  12,298
12/31/05           19,367               13,608                  13,696

PAST PERFORMANCE IS NOT PREDICTIVE OF FUTURE RESULTS. The performance tables and
graph do not reflect the deduction of taxes that a shareholder would pay on fund
distributions or the redemption of fund shares.


COMPARATIVE RESULTS
- --------------------------------------------------------------------------------


                                  AVERAGE ANNUAL RETURNS THROUGH DECEMBER 31, 2005 (A)
                                  ----------------------------------------------------
                                                                                                             Since
                                                                                                           Inception
                                                       QUARTER      1 YEAR       3 YEAR       5 YEAR       (5/11/98)
- --------------------------------------------------------------------------------------------------------------------
                                                                                              
  GAMCO GLOBAL OPPORTUNITY FUND CLASS AAA ............  4.68%       15.12%       21.72%         2.56%        9.02%
  MSCI AC World Free Index ...........................  3.43        11.37        20.18          3.41         4.19
  Lipper Global Multi-Cap Growth Fund Average ........  3.81        11.60        20.42          2.90         6.65
  Class A ............................................  4.64        15.18        21.74          2.60         9.06
                                                       (1.39)(b)     8.57(b)     19.36(b)       1.39(b)      8.22(b)
  Class B ............................................  4.45        14.23        20.82          1.83         8.50
                                                       (0.55)(c)     9.23(c)     20.13(c)       1.45(c)      8.50(c)
  Class C ............................................  4.44        14.47        21.69          2.64         9.08
                                                        3.44(c)     13.47(c)     21.69(c)       2.64(c)      9.08(c)

 (a) RETURNS  REPRESENT PAST  PERFORMANCE  AND DO NOT GUARANTEE  FUTURE RESULTS.
     TOTAL RETURNS AND AVERAGE ANNUAL RETURNS REFLECT CHANGES IN SHARE PRICE AND
     REINVESTMENT  OF  DIVIDENDS  AND  DISTRIBUTIONS  AND ARE  NET OF  EXPENSES.
     INVESTMENT RETURNS AND THE PRINCIPAL VALUE OF AN INVESTMENT WILL FLUCTUATE.
     WHEN  SHARES  ARE  REDEEMED,  THEY MAY BE  WORTH  MORE OR LESS  THAN  THEIR
     ORIGINAL  COST.  CURRENT  PERFORMANCE  MAY BE  LOWER  OR  HIGHER  THAN  THE
     PERFORMANCE DATA PRESENTED.  PERFORMANCE  RETURNS FOR PERIODS LESS THAN ONE
     YEAR ARE NOT ANNUALIZED.  VISIT WWW.GABELLI.COM FOR PERFORMANCE INFORMATION
     AS OF THE MOST RECENT MONTH END.  INVESTORS  SHOULD CONSIDER THE INVESTMENT
     OBJECTIVES,  RISKS,  CHARGES,  AND  EXPENSES OF THE FUND  CAREFULLY  BEFORE
     INVESTING.  THE PROSPECTUS  CONTAINS MORE INFORMATION  ABOUT THIS AND OTHER
     MATTERS AND SHOULD BE READ CAREFULLY BEFORE INVESTING. INVESTING IN FOREIGN
     SECURITIES  INVOLVES RISKS NOT ORDINARILY  ASSOCIATED  WITH  INVESTMENTS IN
     DOMESTIC ISSUES,  INCLUDING CURRENCY FLUCTUATION,  ECONOMIC,  AND POLITICAL
     RISKS.
     THE CLASS AAA SHARES' NET ASSET  VALUES ARE USED TO  CALCULATE  PERFORMANCE
     FOR THE PERIODS PRIOR TO THE ISSUANCE OF CLASS A SHARES, CLASS B SHARES AND
     CLASS C SHARES ON MARCH 12,  2000,  AUGUST 16, 2000 AND  NOVEMBER 23, 2001,
     RESPECTIVELY.  THE  ACTUAL  PERFORMANCE  FOR THE CLASS B SHARES AND CLASS C
     SHARES WOULD HAVE BEEN LOWER FOR THE PERIODS  STARTING  PRIOR TO AUGUST 16,
     2000 AND NOVEMBER 23, 2001,  RESPECTIVELY,  DUE TO THE ADDITIONAL  EXPENSES
     ASSOCIATED WITH THESE CLASSES OF SHARES.  RETURNS WOULD HAVE BEEN LOWER HAD
     THE ADVISER NOT REIMBURSED  CERTAIN EXPENSES OF THE FUND. THE MSCI AC WORLD
     FREE INDEX IS AN UNMANAGED INDICATOR OF STOCK MARKET PERFORMANCE, WHILE THE
     LIPPER AVERAGE REFLECTS THE AVERAGE  PERFORMANCE OF MUTUAL FUNDS CLASSIFIED
     IN THIS PARTICULAR CATEGORY.
 (b) INCLUDES THE EFFECT OF THE  MAXIMUM  5.75% SALES CHARGE AT THE BEGINNING OF
     THE PERIOD.
 (c) INCLUDES THE EFFECT OF THE  APPLICABLE  CONTINGENT DEFERRED SALES CHARGE AT
     THE END OF THE PERIOD  SHOWN FOR CLASS B AND CLASS C SHARES,  RESPECTIVELY.
     CLASS B SHARES ARE NOT AVAILABLE FOR NEW PURCHASES.
- --------------------------------------------------------------------------------

                                       2


THE GAMCO GLOBAL OPPORTUNITY FUND
DISCLOSURE  OF FUND  EXPENSES  (UNAUDITED)
For the Six Month Period from July 1, 2005 through December 31, 2005
                                                                   EXPENSE TABLE
================================================================================

We believe it is important for you to understand the impact of fees and expenses
regarding  your  investment.  All mutual  funds have  operating  expenses.  As a
shareholder  of a fund,  you  incur  ongoing  costs,  which  include  costs  for
portfolio  management,  administrative  services,  and shareholder reports (like
this one), among others.  Operating  expenses,  which are deducted from a fund's
gross income,  directly  reduce the investment  return of a fund.  When a fund's
expenses are expressed as a percentage of its average net assets, this figure is
known as the expense  ratio.  The  following  examples  are intended to help you
understand  the  ongoing  costs (in  dollars) of  investing  in your Fund and to
compare these costs with those of other mutual funds.  The examples are based on
an  investment  of $1,000 made at the beginning of the period shown and held for
the entire period.

The Expense Table below illustrates your Fund's costs in two ways:

ACTUAL FUND  RETURN:  This section  provides  information  about actual  account
values and actual expenses. You may use this section to help you to estimate the
actual  expenses that you paid over the period after any fee waivers and expense
reimbursements.  The "Ending  Account  Value"  shown is derived  from the Fund's
ACTUAL return during the past six months,  and the "Expenses Paid During Period"
shows the dollar  amount  that would have been paid by an  investor  who started
with $1,000 in the Fund. You may use this information,  together with the amount
you invested, to estimate the expenses that you paid over the period.

To do so, simply  divide your account  value by $1,000 (for  example,  an $8,600
account value  divided by $1,000 = 8.6),  then multiply the result by the number
given for your Fund under the heading  "Expenses Paid During Period" to estimate
the expenses you paid during this period.

HYPOTHETICAL 5% RETURN:  This section provides  information  about  hypothetical
account  values and  hypothetical  expenses  based on the Fund's actual  expense
ratio. It assumes a hypothetical  annualized return of 5% before expenses during
the period shown. In this case - because the hypothetical return used is NOT the
Fund's  actual  return - the  results  do not apply to your  investment  and you
cannot use the  hypothetical  account  value and expense to estimate  the actual
ending  account  balance or expenses  you paid for the period.  This  example is
useful in making  comparisons  of the ongoing costs of investing in the Fund and
other  funds.  To do so,  compare  this  5%  hypothetical  example  with  the 5%
hypothetical examples that appear in shareholder reports of other funds.

Please note that the  expenses  shown in the table are meant to  highlight  your
ongoing  costs only and do not  reflect  any  transactional  costs such as sales
charges (loads),  redemption fees, or exchange fees, if any, which are described
in the Prospectus. If these costs were applied to your account, your costs would
be higher.  Therefore, the 5% hypothetical return is useful in comparing ongoing
costs only,  and will not help you determine the relative  total costs of owning
different funds. The "Annualized  Expense Ratio"  represents the actual expenses
for the last six  months  and may be  different  from the  expense  ratio in the
Financial Highlights which is for the year ended December 31, 2005.

                    Beginning       Ending       Annualized     Expenses
                  Account Value  Account Value     Expense     Paid During
                    07/01/05       12/31/05         Ratio        Period*
- --------------------------------------------------------------------------------
THE GAMCO GLOBAL OPPORTUNITY FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Class AAA          $1,000.00      $1,153.70         2.00%         $10.86
Class A            $1,000.00      $1,153.40         2.00%         $10.86
Class B            $1,000.00      $1,149.10         2.75%         $14.90
Class C            $1,000.00      $1,148.70         2.75%         $14.89

HYPOTHETICAL 5% RETURN
Class AAA          $1,000.00      $1,015.12         2.00%         $10.16
Class A            $1,000.00      $1,015.12         2.00%         $10.16
Class B            $1,000.00      $1,011.34         2.75%         $13.94
Class C            $1,000.00      $1,011.34         2.75%         $13.94

*  Expenses are equal to the Fund's  annualized  expense  ratio for the last six
   months multiplied by the average account value over the period, multiplied by
   the number of days in the most recent fiscal half-year, then divided by 365.

                                       3


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

The following table presents portfolio holdings as a percent of total net assets
as of December 31, 2005:


THE GAMCO GLOBAL OPPORTUNITY FUND

Metals and Mining .................................. 12.8%
Health Care ........................................ 12.4%
Energy and Utilities ............................... 11.7%
Financial Services .................................  9.8%
Consumer Products ..................................  9.1%
Entertainment ......................................  5.3%
Telecommunications .................................  5.0%
Retail .............................................  4.6%
Building and Construction ..........................  4.1%
Food and Beverage ..................................  4.0%
Computer Software and Services .....................  3.6%
Diversified Industrial .............................  3.1%
Aerospace ..........................................  2.6%
Cable and Satellite ................................  2.5%
Broadcasting .......................................  1.9%
Aviation: Parts and Services .......................  1.8%
Hotels and Gaming ..................................  1.6%
Wireless Communications ............................  1.0%
Business Services ..................................  0.9%
Electronics ........................................  0.7%
Publishing .........................................  0.6%
U.S. Treasury Bills ................................  0.4%
Other Assets and Liabilities - (Net) ...............  0.5%
                                                    ------
                                                    100.0%
                                                    ======

THE FUND FILES A COMPLETE  SCHEDULE OF PORTFOLIO  HOLDINGS  WITH THE SEC FOR THE
FIRST AND THIRD  QUARTERS OF EACH FISCAL YEAR ON FORM N-Q, THE LAST OF WHICH WAS
FILED FOR THE QUARTER  ENDED  SEPTEMBER 30, 2005.  SHAREHOLDERS  MAY OBTAIN THIS
INFORMATION   AT   WWW.GABELLI.COM   OR  BY  CALLING  THE  FUND  AT  800-GABELLI
(800-422-3554).  THE  FUND'S  FORM N-Q IS  AVAILABLE  ON THE  SEC'S  WEBSITE  AT
WWW.SEC.GOV  AND MAY ALSO BE  REVIEWED  AND  COPIED AT THE  COMMISSION'S  PUBLIC
REFERENCE  ROOM IN  WASHINGTON,  DC.  INFORMATION ON THE OPERATION OF THE PUBLIC
REFERENCE ROOM MAY BE OBTAINED BY CALLING 1-800-SEC-0330.


PROXY VOTING

The Fund files Form N-PX with its complete proxy voting record for the 12 months
ended June 30th,  no later than August 31st of each year. A  description  of the
Fund's  proxy  voting  policies,  procedures,  and how the  Fund  voted  proxies
relating to portfolio securities are available without charge, upon request, (i)
by calling 800-GABELLI  (800-422-3554);  (ii) by writing to The Gabelli Funds at
One Corporate Center,  Rye, NY 10580-1422;  and (iii) by visiting the Securities
and Exchange Commission's website at www.sec.gov.

                                       4


THE GAMCO GLOBAL OPPORTUNITY FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              COMMON STOCKS -- 99.1%
              AEROSPACE -- 2.6%
       3,000  L-3 Communications Holdings Inc. ..... $   127,720   $   223,050
       5,500  Lockheed Martin Corp. ................     135,166       349,965
                                                     -----------   -----------
                                                         262,886       573,015
                                                     -----------   -----------
              AVIATION: PARTS AND SERVICES -- 1.8%
       7,400  Precision Castparts Corp. ............     109,705       383,394
                                                     -----------   -----------
              BROADCASTING -- 1.9%
      20,000  Mediaset SpA .........................     195,380       211,917
       5,000  Modern Times Group, Cl. B+ ...........     185,468       208,635
                                                     -----------   -----------
                                                         380,848       420,552
                                                     -----------   -----------
              BUILDING AND CONSTRUCTION -- 4.1%
      22,000  Aica Kogyo Co. Ltd. ..................     210,378       301,827
      20,125  CRH plc ..............................     270,443       592,073
                                                     -----------   -----------
                                                         480,821       893,900
                                                     -----------   -----------
              BUSINESS SERVICES -- 0.9%
      12,000  Sohgo Security Services Co. Ltd. .....     150,253       183,660
                                                     -----------   -----------
              CABLE AND SATELLITE -- 2.5%
       7,000  Cablevision Systems Corp., Cl. A+ ....     137,535       164,290
       9,000  Rogers Communications Inc., Cl. B ....     151,574       380,340
                                                     -----------   -----------
                                                         289,109       544,630
                                                     -----------   -----------
              COMPUTER SOFTWARE AND SERVICES -- 3.6%
         700  Google Inc., Cl. A+ ..................     220,948       290,402
      11,500  Microsoft Corp. ......................     301,125       300,725
       5,000  Yahoo! Inc.+ .........................     169,373       195,900
                                                     -----------   -----------
                                                         691,446       787,027
                                                     -----------   -----------
              CONSUMER PRODUCTS -- 9.1%
       7,000  Altadis SA ...........................     214,528       317,568
       6,800  Christian Dior SA ....................     323,455       604,591
      12,700  Compagnie Financiere
                Richemont AG, Cl. A ................     254,839       552,825
       8,500  Escada AG+ ...........................     207,341       272,710
       4,000  Procter & Gamble Co. .................     221,128       231,520
                                                     -----------   -----------
                                                       1,221,291     1,979,214
                                                     -----------   -----------
              DIVERSIFIED INDUSTRIAL -- 3.1%
       7,000  Bouygues SA ..........................     252,231       342,264
       9,500  General Electric Co. .................     320,183       332,975
                                                     -----------   -----------
                                                         572,414       675,239
                                                     -----------   -----------
              ELECTRONICS -- 0.7%
       4,400  Linear Technology Corp. ..............     165,609       158,708
                                                     -----------   -----------

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              ENERGY AND UTILITIES -- 11.7%
       2,200  Imperial Oil Ltd. .................... $   222,619   $   218,420
      40,000  Kanto Natural Gas
                Development Co. Ltd. ...............     205,212       282,868
       6,000  Murphy Oil Corp. .....................     240,211       323,940
       7,000  Petroleo Brasileiro SA, ADR ..........     211,615       498,890
       3,600  Schlumberger Ltd. ....................     238,374       349,740
       6,000  Suncor Energy Inc. ...................     201,704       378,780
      45,000  Tokai Carbon Co. Ltd. ................     196,346       209,098
       4,000  Transocean Inc.+ .....................     164,064       278,760
                                                     -----------   -----------
                                                       1,680,145     2,540,496
                                                     -----------   -----------
              ENTERTAINMENT -- 5.3%
      14,000  Discovery Holding Co., Cl. A+ ........     201,048       212,100
       4,500  Oriental Land Co. Ltd. ...............     261,721       245,347
      35,000  Publishing & Broadcasting Ltd. .......     176,587       422,852
      15,000  Time Warner Inc. .....................     225,367       261,600
                                                     -----------   -----------
                                                         864,723     1,141,899
                                                     -----------   -----------
              FINANCIAL SERVICES -- 9.8%
      15,000  Bank of Ireland ......................      92,773       236,187
       5,000  Canaccord Capital Inc. ...............      63,107        64,046
       7,000  Citigroup Inc. .......................     270,158       339,710
       4,375  Julius Baer Holding Ltd. AG ..........     295,394       309,967
      22,000  Nikko Cordial Corp. ..................     233,390       348,463
      25,000  Shizuoka Bank Ltd. ...................     253,840       250,562
       5,000  TSX Group Inc. .......................     198,762       201,428
       4,000  UBS AG ...............................     336,926       380,600
                                                     -----------   -----------
                                                       1,744,350     2,130,963
                                                     -----------   -----------
              FOOD AND BEVERAGE -- 4.0%
       5,000  ARIAKE JAPAN Co. Ltd. ................     121,202       123,161
       5,000  General Mills Inc. ...................     248,004       246,600
       5,000  PepsiCo Inc. .........................     261,500       295,400
       2,700  Whole Foods Market Inc. ..............     136,042       208,953
                                                     -----------   -----------
                                                         766,748       874,114
                                                     -----------   -----------
              HEALTH CARE -- 12.4%
       8,208  GlaxoSmithKline plc ..................     245,935       207,449
       7,000  Novartis AG ..........................     268,348       367,832
       4,000  Roche Holding AG .....................     353,538       600,586
       6,691  Sanofi-Aventis, ADR ..................     231,241       293,735
       1,200  Straumann Holding AG .................     254,333       278,072
       2,000  Synthes Inc. .........................     189,898       224,649
       6,000  Takeda Pharmaceutical Co. Ltd. .......     376,833       324,585
       2,000  UnitedHealth Group Inc. ..............     112,260       124,280
       5,000  William Demant Holding A/S+ ..........     235,806       276,499
                                                     -----------   -----------
                                                       2,268,192     2,697,687
                                                     -----------   -----------

                See accompanying notes to financial statements.

                                       5

THE GAMCO GLOBAL OPPORTUNITY FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
    SHARES                                                COST        VALUE
   ---------                                              ----       -------
              COMMON STOCKS (CONTINUED)
              HOTELS AND GAMING -- 1.6%
      10,000  Greek Organization of
                 Football Prognostics SA ........... $   168,339   $   344,513
                                                     -----------   -----------
              METALS AND MINING -- 12.8%
      17,726  Andsberg Ltd.+ (a) ...................       8,277        15,776
      14,726  Antofagasta plc ......................      88,100       473,529
      59,000  Gold Fields Ltd., ADR ................     256,194     1,040,170
      10,000  Harmony Gold Mining Co. Ltd.+ ........      56,555       134,176
      24,000  Harmony Gold Mining Co. Ltd., ADR+ ...     130,306       313,200
      15,000  Newmont Mining Corp. .................     349,500       801,000
                                                     -----------   -----------
                                                         888,932     2,777,851
                                                     -----------   -----------
              PUBLISHING -- 0.6%
      40,000  Independent News & Media plc .........      98,736       120,284
                                                      -----------   -----------
              RETAIL -- 4.6%
      12,000  Matsumotokiyoshi Co. Ltd. ............     309,058       379,531
       8,000  Seven & I Holdings Co. Ltd.+ .........     275,092       342,562
       6,000  Walgreen Co. .........................     233,238       265,560
                                                     -----------   -----------
                                                         817,388       987,653
                                                     -----------   -----------
              TELECOMMUNICATIONS -- 5.0%
       3,000  ALLTEL Corp. .........................     156,153       189,300
          40  KDDI Corp. ...........................     281,155       230,635
      15,675  Sprint Nextel Corp. ..................     280,989       366,168
       2,300  Telephone & Data Systems Inc. ........      45,066        82,869
       2,300  Telephone & Data Systems Inc., Special      41,599        79,603
       4,500  Verizon Communications Inc. ..........     273,319       135,540
                                                     -----------   -----------
                                                       1,078,281     1,084,115
                                                     -----------   -----------
              WIRELESS COMMUNICATIONS -- 1.0%
       4,500  United States Cellular Corp.+ ........     254,809       222,300
                                                     -----------   -----------
              TOTAL COMMON STOCKS ..................  14,955,025    21,521,214
                                                     -----------   -----------

   PRINCIPAL                                                          MARKET
    AMOUNT                                               COST         VALUE
   ---------                                             ----        -------
              U.S. GOVERNMENT OBLIGATIONS -- 0.4%
    $ 95,000  U.S.  Treasury  Bill,
                3.790%++, 01/19/06 ................. $    94,842   $    94,835
                                                     -----------   -----------
              TOTAL INVESTMENTS -- 99.5% ........... $15,049,867    21,616,049
                                                     ===========
              OTHER ASSETS AND LIABILITIES (NET) -- 0.5% ........      104,711
                                                                   -----------
              NET ASSETS -- 100.0% ..............................  $21,720,760
                                                                   ===========
- ----------------
(a)   Security  fair  valued  under  procedures  established  by  the  Board  of
      Directors.  The procedures may include  reviewing  valuation of comparable
      securities and other factors on a regular basis. At December 31, 2005, the
      market value of the fair valued  security  amounted to $15,776 or 0.07% of
      total net assets.
 +    Non-income producing security.
 ++   Represents annualized yield at date of purchase.
 ADR  American Depository Receipt


                                        % OF
                                       MARKET      MARKET
GEOGRAPHIC DIVERSIFICATION              VALUE      VALUE
- --------------------------            --------    --------
North America ........................  37.6%   $ 8,123,700
Europe ...............................  35.1      7,582,001
Japan ................................  14.9      3,222,300
South Africa .........................   6.9      1,487,546
Latin America ........................   3.6        777,650
Asia/Pacific .........................   1.9        422,852
                                       ------   -----------
                                       100.0%   $21,616,049
                                       ======   ===========

                 See accompanying notes to financial statements.

                                        6


                        THE GAMCO GLOBAL OPPORTUNITY FUND


STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2005
================================================================================

ASSETS:
  Investments, at value (cost $15,049,867) ...................  $ 21,616,049
  Foreign currency, at value ($63,107) .......................        63,186
  Cash .......................................................           965
  Receivable for Fund shares sold ............................       137,845
  Dividends receivable .......................................        29,626
  Other assets ...............................................         2,048
                                                                ------------
  TOTAL ASSETS ...............................................    21,849,719
                                                                ------------
LIABILITIES:
  Payable for investments purchased ..........................        63,186
  Payable for shareholder communications expenses ............        18,743
  Payable for legal and audit fees ...........................        13,998
  Payable for investment advisory fees .......................        13,525
  Payable for shareholder services fees ......................         5,066
  Payable for distribution fees ..............................         4,830
  Payable for Fund shares redeemed ...........................         2,684
  Other accrued expenses .....................................         6,927
                                                                ------------
  TOTAL LIABILITIES ..........................................       128,959
                                                                ------------
  NET ASSETS applicable to 1,365,472
    shares outstanding .......................................  $ 21,720,760
                                                                ============
NET ASSETS CONSIST OF:
  Capital stock, each class at $0.001 par value ..............  $      1,365
  Additional paid-in capital .................................    22,376,559
  Accumulated distributions in excess of
    net investment income ....................................       (39,588)
  Accumulated net realized loss on investments
    and foreign currency transactions ........................    (7,183,096)
  Net unrealized appreciation on investments .................     6,566,182
  Net unrealized depreciation on foreign currency translations          (662)
                                                                ------------
  NET ASSETS .................................................  $ 21,720,760
                                                                ============
SHARES OF CAPITAL STOCK:
  CLASS AAA:
  Net Asset Value, offering and redemption price
    per share ($21,424,756 / 1,346,753 shares outstanding;
    75,000,000 shares authorized) ............................        $15.91
                                                                      ======
  CLASS A:
  Net Asset Value and redemption price per share
    ($244,038 / 15,375 shares outstanding;
    50,000,000 shares authorized) ............................        $15.87
                                                                      ======
  Maximum offering price per share (NAV / 0.9425,
    based on maximum sales charge of
    5.75% of the offering price) .............................        $16.84
                                                                      ======
  CLASS B:
  Net Asset Value and offering price per share
    ($48,376 / 3,123 shares outstanding;
    25,000,000 shares authorized) ............................        $15.49(a)
                                                                      ======
  CLASS C:
  Net Asset Value and offering price per share
    ($3,590 / 221.3 shares outstanding;
    25,000,000 shares authorized) ............................        $16.22(a)
                                                                      ======
- ------------------
(a) Redemption price varies based on length of time held.


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2005
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $21,566) ......   $   384,542
  Interest .........................................        17,699
                                                       -----------
  TOTAL INVESTMENT INCOME ..........................       402,241
                                                       -----------
EXPENSES:
  Investment advisory fees .........................       207,305
  Distribution fees - Class AAA ....................        51,314
  Distribution fees - Class A ......................           387
  Distribution fees - Class B ......................           476
  Distribution fees - Class C ......................            25
  Shareholder communications expenses ..............        40,925
  Legal and audit fees .............................        29,153
  Registration fees ................................        23,922
  Securities pricing expense .......................        23,506
  Shareholder services fees ........................        18,915
  Custodian fees ...................................        15,034
  Directors' fees ..................................         2,320
  Interest expense .................................         1,499
  Miscellaneous expenses ...........................         8,758
                                                       -----------
  TOTAL EXPENSES ...................................       423,539
  Less:
  Expense reimbursement (see Note 3) ...............       (40,432)
  Custodian fee credits ............................          (284)
                                                       -----------
  NET EXPENSES .....................................       382,823
                                                       -----------
  NET INVESTMENT INCOME ............................        19,418
                                                       -----------
NET REALIZED AND UNREALIZED GAIN (LOSS)
    ON INVESTMENTS AND FOREIGN CURRENCY:
  Net realized gain on investments .................       863,144
  Net realized loss on foreign currency transactions        (6,620)
  Net change in unrealized appreciation/depreciation
    on investments and foreign currency translations     2,088,178
                                                       -----------
  NET REALIZED AND UNREALIZED GAIN (LOSS)
    ON INVESTMENTS AND FOREIGN CURRENCY ............     2,944,702
                                                       -----------
  NET INCREASE IN NET ASSETS RESULTING
   FROM OPERATIONS .................................   $ 2,964,120
                                                       ===========

                 See accompanying notes to financial statements.

                                       7


                        THE GAMCO GLOBAL OPPORTUNITY FUND


STATEMENT OF CHANGES IN NET ASSETS
================================================================================


                                                                 YEAR ENDED         YEAR ENDED
                                                             DECEMBER 31, 2005  DECEMBER 31, 2004
                                                             -----------------  -----------------
                                                                           
OPERATIONS:
  Net investment income ....................................   $     19,418      $     49,315
  Net realized gain (loss) on investments and
    foreign currency transactions ..........................        856,524        (1,229,955)
  Net change in unrealized appreciation/depreciation on
    investments and foreign currency translations ..........      2,088,178         3,736,389
                                                               ------------      ------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS .....      2,964,120         2,555,749
                                                               ------------      ------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income
    Class AAA ..............................................        (30,715)          (70,537)
    Class A ................................................           (552)             (397)
    Class B ................................................           --                 (97)
                                                               ------------      ------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS ......................        (31,267)          (71,031)
                                                               ------------      ------------
CAPITAL SHARE TRANSACTIONS:
    Class AAA ..............................................     (2,510,492)         (744,951)
    Class A ................................................        112,811            27,787
    Class B ................................................         (9,204)           35,901
    Class C ................................................          3,000              --
                                                               ------------      ------------
  NET DECREASE IN NET ASSETS FROM CAPITAL SHARE TRANSACTIONS     (2,403,885)         (681,263)
                                                               ------------      ------------
  REDEMPTION FEES ..........................................            970             3,073
                                                               ------------      ------------
  NET INCREASE IN NET ASSETS ...............................        529,938         1,806,528
NET ASSETS:
  Beginning of period ......................................     21,190,822        19,384,294
                                                               ------------      ------------
  End of period (including undistributed net investment
    income of $0 and $0, respectively) .....................   $ 21,720,760      $ 21,190,822
                                                               ============      ============



NOTES TO FINANCIAL STATEMENTS
================================================================================


1. ORGANIZATION.  The GAMCO Global Opportunity Fund (the "Fund"),  formerly, The
Gabelli  Global  Opportunity  Fund, a series of GAMCO Global Series Funds,  Inc.
(the "Corporation"),  formerly, Gabelli Global Series Funds, Inc., was organized
on July  16,  1993 as a  Maryland  corporation.  The  Fund is a  non-diversified
open-end  management  investment company registered under the Investment Company
Act of 1940,  as amended (the "1940 Act"),  and one of four  separately  managed
portfolios  (collectively,  the  "Portfolios")  of the  Corporation.  The Fund's
primary  objective  is  capital  appreciation.  The  Fund  commenced  investment
operations on May 11, 1998.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance  with  U.S.  generally  accepted   accounting   principles   requires
management to make estimates and  assumptions  that affect the reported  amounts
and  disclosures in the financial  statements.  Actual results could differ from
those estimates.  The following is a summary of significant  accounting policies
followed by the Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange or traded in the U.S. over-the-counter market for
which market quotations are readily available are valued at the last quoted sale
price or a market's  official  closing  price as of the close of business on the
day the  securities  are being  valued.  If there  were no sales  that day,  the
security is valued at the  average of the  closing  bid and asked  prices or, if
there were no asked  prices  quoted on that day,  then the security is valued at
the closing bid price on that day. If no bid

                                       8


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

or asked  prices  are  quoted on such day,  the  security  is valued at the most
recently  available  price  or,  if the  Board of  Directors  (the  "Board")  so
determines,  by such other method as the Board shall determine in good faith, to
reflect  its fair market  value.  Portfolio  securities  traded on more than one
national  securities exchange or market are valued according to the broadest and
most representative market, as determined by Gabelli Funds, LLC (the "Adviser").

Portfolio securities primarily traded on foreign markets are generally valued at
the preceding closing values of such securities on their respective exchanges or
if after the close of foreign markets, but prior to the close of business on the
day the securities are being valued,  market  conditions  change  significantly,
certain foreign securities may be fair valued pursuant to procedures established
by the Board. Debt instruments with remaining maturities of 60 days or less that
are not  credit  impaired  are  valued  at  amortized  cost,  unless  the  Board
determines  such amount does not reflect the  securities'  fair value,  in which
case these  securities  will be valued at their fair value as  determined by the
Board. Debt instruments  having a maturity greater than 60 days for which market
quotations are readily available are valued at the average of the latest bid and
asked prices.  If there were no asked prices quoted on such day, the security is
valued using the closing bid price.  Futures contracts are valued at the closing
settlement  price of the  exchange  or board  of trade on which  the  applicable
contract is traded.

Securities and assets for which market  quotations are not readily available are
valued  at their  fair  value  as  determined  in good  faith  under  procedures
established by and under the general  supervision  of the Board.  Fair valuation
methodologies  and procedures may include,  but are not limited to: analysis and
review of available  financial and non-financial  information about the company;
comparisons  to the  valuation  and changes in valuation of similar  securities,
including a comparison of foreign securities to the equivalent U.S. dollar value
ADR  securities at the close of the U.S.  exchange;  and evaluation of any other
information that could be indicative of the value of the security.

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit  guidelines  established  by the  Adviser  and  reviewed by the
Board.  Under  the  terms of a  typical  repurchase  agreement,  the Fund  takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2005, there were no open repurchase agreements.

SECURITIES  SOLD SHORT. A short sale involves  selling a security which the Fund
does not own. The proceeds  received for short sales are recorded as liabilities
and the Fund records an unrealized  gain or loss to the extent of the difference
between the proceeds  received  and the value of the open short  position on the
day of  determination.  The Fund records a realized  gain or loss when the short
position is closed out. By entering into a short sale, the Fund bears the market
risk of an unfavorable change in the price of the security sold short. Dividends
on short sales are  recorded as an expense by the Fund on the  ex-dividend  date
and interest expense is recorded on the accrual basis. The Fund did not hold any
short positions as of December 31, 2005.

                                       9


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

FORWARD  FOREIGN  EXCHANGE  CONTRACTS.  The Fund may engage in  forward  foreign
exchange contracts for hedging a specific transaction with respect to either the
currency in which the  transaction is denominated or another  currency as deemed
appropriate by the Adviser. Forward foreign exchange contracts are valued at the
forward  rate and are  marked-to-market  daily.  The  change in market  value is
included in  unrealized  appreciation/depreciation  on  investments  and foreign
currency translations.  When the contract is closed, the Fund records a realized
gain or loss equal to the  difference  between the value of the  contract at the
time it was opened and the value at the time it was closed.

The use of forward foreign exchange contracts does not eliminate fluctuations in
the underlying prices of the Fund's portfolio securities,  but it does establish
a rate of exchange that can be achieved in the future.  Although forward foreign
exchange  contracts  limit the risk of loss due to a decline in the value of the
hedged currency, they also limit any potential gain that might result should the
value of the currency increase. In addition,  the Fund could be exposed to risks
if the  counterparties  to the  contracts  are unable to meet the terms of their
contracts.  At December 31, 2005,  there were no open forward  foreign  exchange
contracts.

FOREIGN CURRENCY TRANSLATIONS.  The books and records of the Fund are maintained
in United States (U.S.)  dollars.  Foreign  currencies,  investments,  and other
assets and liabilities are translated into U.S.  dollars at the current exchange
rates.  Purchases and sales of investment  securities,  income, and expenses are
translated  at the exchange  rate  prevailing  on the  respective  dates of such
transactions.  Unrealized  gains and losses that result from  changes in foreign
exchange rates and/or changes in market prices of securities  have been included
in unrealized  appreciation/depreciation  on  investments  and foreign  currency
translations.  Net realized  foreign  currency  gains and losses  resulting from
changes in exchange  rates include  foreign  currency  gains and losses  between
trade date and settlement date on investment  securities  transactions,  foreign
currency  transactions,  and the difference  between the amounts of interest and
dividends  recorded on the books of the Fund and the amounts actually  received.
The  portion of foreign  currency  gains and losses  related to  fluctuation  in
exchange rates between the initial trade date and subsequent  sale trade date is
included in realized gain/(loss) on investments.

FOREIGN  SECURITIES.  The Fund  may  directly  purchase  securities  of  foreign
issuers.  Investing in securities of foreign issuers  involves special risks not
typically  associated  with investing in securities of U.S.  issuers.  The risks
include  possible  revaluation of currencies,  the ability to repatriate  funds,
less complete financial information about companies, and possible future adverse
political  and  economic  developments.  Moreover,  securities  of many  foreign
issuers and their markets may be less liquid and their prices more volatile than
those of securities of comparable U.S. issuers.

FOREIGN  TAXES.  The Fund may be subject to  foreign  taxes on income,  gains on
investments or currency repatriation, a portion of which may be recoverable. The
Fund will accrue such taxes and recoveries as applicable, based upon its current
interpretation  of tax rules and regulations  that exist in the markets in which
it invests.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium and  accretion  of discount) is recorded on the accrual
basis.  Premiums  and  discounts  on debt  securities  are  amortized  using the
effective  yield  to  maturity  method.  Dividend  income  is  recorded  on  the
ex-dividend date except for certain  dividends which are recorded as soon as the
Fund is informed of the dividend.

                                       10


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

DETERMINATION   OF  NET  ASSET  VALUE  AND  CALCULATION  OF  EXPENSES.   Certain
administrative  expenses are common to, and allocated among,  various affiliated
funds.  Such allocations are made on the basis of each Fund's average net assets
or other criteria  directly  affecting the expenses as determined by the Adviser
pursuant to procedures established by the Board.

In calculating  the net asset value ("NAV") per share of each class,  investment
income, realized and unrealized gains and losses,  redemption fees, and expenses
other than class specific expenses,  are allocated daily to each class of shares
based upon the  proportion  of net assets of each class at the beginning of each
day. Distribution expenses are borne solely by the class incurring the expense.

CUSTODIAN FEE CREDITS. When cash balances are maintained in the custody account,
the Fund receives  credits which are used to offset  custodian  fees.  The gross
expenses paid under the custody  arrangement  are included in custodian  fees in
the  Statement of  Operations  with the  corresponding  expense  offset shown as
"custodian fee credits".

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders are recorded on the ex-dividend date. Distributions to shareholders
are based on income and capital gains as  determined in accordance  with Federal
income tax  regulations,  which may differ  from  income  and  capital  gains as
determined  under  U.S.  generally   accepted   accounting   principles.   These
differences  are  primarily  due to differing  treatments of income and gains on
various  investment  securities and foreign  currency  transactions  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund. Distributions from net investment income include net realized gains
on  foreign  currency  transactions.   These  book/tax  differences  are  either
temporary or permanent in nature. To the extent these differences are permanent,
adjustments are made to the  appropriate  equity accounts in the period when the
differences arise. These reclassifications have no impact on the NAV of the Fund
and  the  calculation  of net  investment  income  per  share  in the  Financial
Highlights  excludes  these  adjustments.  For the year ended December 31, 2005,
reclassifications  were made to increase accumulated  distributions in excess of
net investment income by $6,620 and to decrease accumulated net realized loss on
investments and foreign currency transactions by $6,620.

The tax character of  distributions  paid during the fiscal years ended December
31,  2005 and  December  31,  2004 was $31,267  and  $71,031,  respectively,  of
ordinary income.

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended (the  "Code").  It is the policy of the Fund to comply with the
requirements  of the Code  applicable to regulated  investment  companies and to
distribute  substantially  all of its net investment  company taxable income and
net capital gains. Therefore, no provision for Federal income taxes is required.

                                       11


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

As  of  December  31, 2005, the components of accumulated earnings/(losses) on a
tax basis were as follows:

             Undistributed ordinary income..   $     3,912
             Capital loss carryforward .....    (7,183,070)
             Net unrealized appreciation ...     6,565,493
             Other temporary differences ...       (43,499)
                                               -----------
             Total accumulated loss ........   $  (657,164)
                                               ===========

At December 31, 2005,  the Fund has net capital loss  carryforwards  for Federal
income tax purposes of $7,183,070, which are available to reduce future required
distributions  of net  capital  gains to  shareholders.  $2,301,024  of the loss
carryforward is available  through 2009;  $1,904,804 is available  through 2010;
$1,776,091 is available  through 2011; and $1,201,151 is available through 2012.
For the year ended  December  31, 2005,  the Fund  utilized net tax capital loss
carryforwards of $833,769.

The following  summarizes  the tax cost of  investments  and related  unrealized
appreciation/depreciation at December 31, 2005:

                                         GROSS         GROSS     NET UNREALIZED
                                      UNREALIZED    UNREALIZED    APPRECIATION/
                             COST    APPRECIATION  DEPRECIATION  (DEPRECIATION)
                             ----    ------------  ------------  --------------
         Investments ... $15,049,894   $6,910,287    $(344,132)    $6,566,155

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the  value of its  average  daily net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business and affairs,  and pays the  compensation  of all
Officers and  Directors of the Fund who are  affiliated  persons of the Adviser.
Effective May 1, 2005, the Adviser has agreed to reimburse  expenses of the Fund
to the extent necessary to maintain the annualized  total operating  expenses of
the Fund  (exclusive  of interest  expense) at 2.00%,  2.00%,  2.75%,  and 2.75%
(1.50%, 1.50%, 2.25%, and 2.25% prior to May 1, 2005) of the value of the Fund's
average  daily  net  assets  for  Class  AAA,  Class A,  Class  B, and  Class C,
respectively.  For the year ended December 31, 2005, the Adviser  reimbursed the
Fund in the amount of $40,432. Beginning January 1, 2004, the Fund is obliged to
repay the Adviser for a period of two fiscal years  following the fiscal year in
which the  Adviser  reimbursed  the Fund only to the extent  that the  operating
expenses  of the  Fund  fall  below  the  applicable  expense  limitations.  The
cumulative amount which the Fund may repay the Adviser is $138,048.

4.  DISTRIBUTION  PLAN.  The Fund's Board has adopted a  distribution  plan (the
"Plan")  for each class of shares  pursuant  to Rule  12b-1  under the 1940 Act.
Gabelli & Company,  Inc.  ("Gabelli &  Company"),  an  affiliate of the Adviser,
serves as  distributor  of the Fund.  Under the Class AAA, Class A, Class B, and
Class C Share  Plans,  payments  are  authorized  to Gabelli & Company at annual
rates of 0.25%, 0.25%, 1.00%, and 1.00%, respectively,  of the average daily net
assets of those classes,  the annual  limitations under each Plan. Such payments
are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2005, other than short-term  securities,  aggregated
$5,217,258 and $7,631,248, respectively.

                                       12


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2005, the
Fund paid  brokerage  commissions  of $150 to Gabelli &  Company.  Additionally,
Gabelli  &  Company  informed  the Fund that it  received  $984  from  investors
representing  commissions  (sales  charges and  underwriting  fees) on sales and
redemptions of Fund shares.

7. LINE OF CREDIT.  The Fund has access to an unsecured  line of credit of up to
$25,000,000  from the  custodian for temporary  borrowing  purposes.  Borrowings
under this  arrangement  bear  interest at 0.75% above the Federal Funds rate on
outstanding balances. At December 31, 2005, there were no borrowings outstanding
from the line of credit.

The  average  daily  amount of  borrowings  outstanding  from the line of credit
within the year ended  December  31,  2005 was $59,800  with a related  weighted
average  interest rate of 4.24%.  The maximum amount borrowed at any time during
the year ended December 31, 2005 was $2,007,000.

8. CAPITAL STOCK TRANSACTIONS.  The Fund currently offers four classes of shares
- -- Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares. Class
AAA Shares are offered only to investors  who acquire them directly from Gabelli
& Company or through  selected  broker/dealers  without a sales charge.  Class A
Shares are subject to a maximum front-end sales charge of 5.75%.  Class B Shares
are subject to a contingent  deferred  sales  charge  ("CDSC")  upon  redemption
within  six  years  of  purchase  and  automatically  convert  to Class A Shares
approximately  eight years after the original  purchase.  The applicable CDSC is
equal to a declining  percentage  of the lesser of the NAV per share at the date
of original  purchase or at the date of redemption,  based on the length of time
held. Class C Shares are subject to a 1% CDSC for one year after purchase. Class
B Shares are  available  only through  exchange of Class B Shares of other funds
distributed  by Gabelli & Company.  The Board has approved  Class I Shares which
have not been offered publicly.

Effective June 15, 2005, the Fund imposed a redemption fee of 2.00% on Class AAA
Shares,  Class A Shares, Class B Shares, and Class C Shares that are redeemed or
exchanged  on or before the seventh day after the date of a purchase.  (Prior to
June 15, 2005, the Fund imposed a redemption fee on shares that were redeemed or
exchanged  within the sixtieth day after the date of a purchase.) The redemption
fee  is  deducted  from  the  proceeds   otherwise   payable  to  the  redeeming
shareholders  and is retained by the Fund. The  redemption  fees retained by the
Fund during the years ended  December 31, 2005 and December 31, 2004 amounted to
$970 and $3,073, respectively.

The redemption fee does not apply to shares purchased  through programs that the
Adviser  determined to have  appropriate  short-term  trading policies in place.
Additionally,  certain recordkeepers for qualified and non-qualified  retirement
plans that could not collect the redemption fee at the participant  level due to
systems limitations have received an extension to implement such systems.

                                       13


THE GAMCO GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

Transactions in shares of capital stock were as follows:


                                                               YEAR ENDED                       YEAR ENDED
                                                            DECEMBER 31, 2005                DECEMBER 31, 2004
                                                       --------------------------        -------------------------
                                                        SHARES          AMOUNT            SHARES         AMOUNT
                                                       --------       -----------        --------      -----------

                                                                CLASS AAA                        CLASS AAA
                                                       --------------------------        -------------------------
                                                                                           
Shares sold ..........................................  343,785       $ 5,002,957         224,553      $ 2,803,469
Shares issued upon reinvestment of dividends .........    1,830            29,087           4,847           66,793
Shares redeemed ...................................... (518,825)       (7,542,536)       (294,740)      (3,615,213)
                                                       --------       -----------        --------      -----------
  Net decrease ....................................... (173,210)      $(2,510,492)        (65,340)     $  (744,951)
                                                       ========       ===========        ========      ===========

                                                                 CLASS A                          CLASS A
                                                       --------------------------        -------------------------
Shares sold ..........................................   10,880       $   157,398           2,611      $    33,417
Shares issued upon reinvestment of dividends .........       35               547              29              399
Shares redeemed ......................................   (3,190)          (45,134)           (494)          (6,029)
                                                       --------       -----------        --------      -----------
  Net increase .......................................    7,725       $   112,811           2,146      $    27,787
                                                       ========       ===========        ========      ===========

                                                                 CLASS B                          CLASS B
                                                       --------------------------        -------------------------
Shares sold ..........................................       36       $       500           2,776      $    35,814
Shares issued upon reinvestment of dividends .........       --                --               7               97
Shares redeemed ......................................     (727)           (9,704)             (1)             (10)
                                                       --------       -----------        --------      -----------
  Net increase (decrease) ............................     (691)      $    (9,204)          2,782      $    35,901
                                                       ========       ===========        ========      ===========
                                                                 CLASS C                          CLASS C
                                                       --------------------------        -------------------------
Shares sold ..........................................      211       $     3,000              --               --
Shares issued upon reinvestment of dividends .........       --                --              --               --
Shares redeemed ......................................       --                --              --               --
                                                       --------       -----------        --------      -----------
  Net increase .......................................      211       $     3,000              --               --
                                                       ========       ===========        ========      ===========


9.  INDEMNIFICATIONS.  The Fund enters into  contracts that contain a variety of
indemnifications.  The Fund's  maximum  exposure  under  these  arrangements  is
unknown.  However, the Fund has not had prior claims or losses pursuant to these
contracts and expects the risk of loss to be remote.

10. OTHER MATTERS.  The Adviser and/or  affiliates have received  subpoenas from
the Attorney  General of the State of New York and the  Securities  and Exchange
Commission (the "SEC")  requesting  information on mutual fund trading practices
involving  certain  funds managed by the Adviser.  GAMCO  Investors,  Inc.,  the
Adviser's  parent  company,  is responding  to these  requests for documents and
testimony.  On a separate matter, in September 2005, the Adviser was informed by
the staff of the SEC that the  staff may  recommend  to the  Commission  that an
administrative  remedy and a  monetary  penalty  be sought  from the  Adviser in
connection  with the  actions of two of seven  closed-end  funds  managed by the
Adviser  relating  to  Section  19(a)  and Rule  19a-1 of the  1940  Act.  These
provisions require registered investment companies to provide written statements
to shareholders  when a dividend is made from a source other than net investment
income. While the two closed-end funds sent annual statements and provided other
materials containing this information, the funds did not send written statements
to shareholders  with each  distribution in 2002 and 2003. The Adviser  believes
that all of the funds are now in  compliance.  The Adviser  believes  that these
matters would have no effect on the Fund or any material  adverse  effect on the
Adviser or its ability to manage the Fund.

                                       14


THE GAMCO GLOBAL OPPORTUNITY FUND
FINANCIAL HIGHLIGHTS
================================================================================

Selected data for a share of capital stock outstanding throughout each period:



                            INCOME FROM INVESTMENT OPERATIONS           DISTRIBUTIONS
                          -------------------------------------   --------------------------
                                          Net
              Net Asset       Net     Realized and      Total
   Period       Value,    Investment   Unrealized       from         Net
   Ended      Beginning     Income   Gain (Loss) on  Investment   Investment       Total     Redemption
December 31,  of Period    (Loss)(h)   Investments   Operations     Income     Distributions   Fees(h)
- ------------  ---------    --------    -----------   ----------     ------     -------------   -------
                                                                          
CLASS AAA
  2005         $13.84       $ 0.01        $2.08        $2.09       $(0.02)         $(0.02)     $0.00(g)
  2004          12.18         0.03         1.68         1.71        (0.05)          (0.05)      0.00(g)
  2003           8.87         0.00(g)      3.29         3.29        (0.01)          (0.01)      0.03
  2002          10.02         0.00(g)     (1.15)       (1.15)          --              --         --
  2001          14.24         0.13        (4.25)       (4.12)       (0.10)          (0.10)        --
CLASS A
  2005         $13.81       $ 0.01        $2.09        $2.10       $(0.04)         $(0.04)     $0.00(g)
  2004          12.16         0.03         1.67         1.70        (0.05)          (0.05)      0.00(g)
  2003           8.86         0.00(g)      3.28         3.28        (0.01)          (0.01)      0.03
  2002           9.99         0.00(g)     (1.13)       (1.13)          --              --         --
  2001          14.21         0.13        (4.24)       (4.11)       (0.11)          (0.11)        --
CLASS B
  2005         $13.56       $(0.08)       $2.01        $1.93           --               --     $0.00(g)
  2004          12.00        (0.07)        1.66         1.59       $(0.03)         $(0.03)      0.00(g)
  2003           8.80        (0.07)        3.24         3.17           --               --      0.03
  2002          10.00        (0.07)       (1.13)       (1.20)          --               --        --
  2001          14.22         0.07        (4.26)       (4.19)       (0.03)          (0.03)        --
CLASS C(E)
  2005         $14.17       $(0.10)       $2.15        $2.05           --               --     $0.00(g)
  2004          12.39         0.07         1.71         1.78           --               --      0.00(g)
  2003           9.00        (0.07)        3.43         3.36           --               --      0.03
  2002          10.11        (0.07)       (1.04)       (1.11)          --               --        --
  2001(f)       10.15         0.07        (0.11)       (0.04)          --               --        --



                                RATIOS TO AVERAGE NET ASSETS/SUPPLEMENTAL DATA
                         ----------------------------------------------------------

              Net Asset            Net Assets    Net        Operating          Operating
   Period       Value,               End of   Investment     Expenses          Expenses          Portfolio
   Ended        End of    Total      Period     Income         Before           Net of           Turnover
December 31,    Period   Return+   (in 000's)   (Loss)    Reimbursements(b) Reimbursement(c)(d)    Rate
- ------------    -------  -------   ----------   ------    ----------------- ------------------   ---------
                                                                             
CLASS AAA
  2005          $15.91    15.1%    $21,425       0.10%           2.04%            1.85%(i)          26%
  2004           13.84    14.0      21,033       0.25            2.00             1.50              35
  2003           12.18    37.4      19,305       0.04            1.83             1.52              13
  2002            8.87   (11.5)     15,000      (0.05)           2.39             1.59               0
  2001           10.02   (28.9)     18,422       1.11            2.00             1.59              31
CLASS A
  2005          $15.87    15.2%    $   244       0.05%           2.06%            1.87%(i)          26%
  2004           13.81    14.0         106       0.26            2.00             1.50              35
  2003           12.16    37.4          67       0.04            1.83             1.52              13
  2002            8.86   (11.3)         36      (0.05)           2.39             1.59               0
  2001            9.99   (29.0)         45       1.11            2.00             1.59              31
CLASS B
  2005          $15.49    14.2%    $    48      (0.60)%          2.79%            2.58%(i)          26%
  2004           13.56    13.2          52      (0.53)           2.75             2.25              35
  2003           12.00    36.4          12      (0.71)           2.58             2.27              13
  2002            8.80   (12.0)          9      (0.80)           3.14             2.34               0
  2001           10.00   (29.5)         10       0.36            2.75             2.34              31
CLASS C(E)
  2005          $16.22    14.5%    $     4      (0.66)%          2.79%            2.68%(i)          26%
  2004           14.17    14.4           0.1     0.58            2.75             2.25              35
  2003           12.39    37.7           0.1    (0.71)           2.58             2.27              13
  2002            9.00   (11.0)          0.1    (0.80)           3.14             2.34               0
  2001(f)        10.11   (29.0)          0.1     0.36(a)         2.75(a)          2.34(a)           31

- ------------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including  reinvestment of dividends and does not reflect  applicable  sales
    charges.  Total  return  for  the  period  of  less  than  one  year  is not
    annualized.
(a) Annualized.
(b) During the years ended December 31, 2005,  2004,  2003,  2002, and 2001, the
    Adviser   voluntarily   reimbursed   certain   expenses.   If  such  expense
    reimbursements had not occurred,  the ratio of operating expenses to average
    net assets would have been as shown.
(c) The Fund incurred interest expense during the years ended December 31, 2004,
    2003, 2002, and 2001. If interest expense had not been incurred,  the ratios
    of operating  expenses to average net assets  would have been 1.50%,  1.50%,
    2.25%, and 2.25% for Class AAA, Class A, Class B, and Class C,  respectively
    for each year.
(d) The Fund incurred  interest expense during the year ended December 31, 2005.
    If interest expense had not been incurred,  the ratios of operating expenses
    to average net assets  would have been 1.84%,  1.86%,  2.57%,  and 2.68% for
    Class AAA, Class A, Class B, and Class C, respectively.
(e) Class C Shares were  outstanding  for the period  October  27, 2000  through
    December  12, 2000 and for the period  April 24, 2001  through May 10, 2001.
    Financial Highlights are not presented for Class C Shares as the information
    for this period is not considered meaningful.
(f) From November 23, 2001, the date shares were continuously  outstanding.
(g) Amount  represents  less  than  $0.005  per  share.
(h) Per  share  data is calculated using the average shares outstanding method.
(i) The ratios do not include a reduction of expenses for  custodian fee credits
    on cash balances maintained with the custodian. Including such custodian fee
    credits,  the expense ratios for the year ended December 31, 2005 would have
    been 1.84%,  1.87%,  2.58%,  and 2.68% for Class AAA,  Class A, Class B, and
    Class C, respectively.

                 See accompanying notes to financial statements.

                                       15


THE GAMCO GLOBAL OPPORTUNITY FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Directors of
GAMCO Global Series Funds, Inc.

We have audited the accompanying statement of assets and liabilities,  including
the schedule of investments,  of The GAMCO Global  Opportunity Fund (the "Fund")
(formerly The Gabelli Global  Opportunity Fund), a series of GAMCO Global Series
Funds,  Inc.,  (formerly  Gabelli Global Series Funds,  Inc.) as of December 31,
2005,  and the related  statement  of  operations  for the year then ended,  the
statements of changes in net assets for each of the two years in the period then
ended,  and the financial  highlights  for each of the three years in the period
then  ended.  These  financial  statements  and  financial  highlights  are  the
responsibility  of the Fund's  management.  Our  responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audits.  The financial  highlights for each of the two years in the period ended
December 31, 2002 were audited by other  auditors whose report dated January 31,
2003, expressed an unqualified opinion on those financial highlights.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material  misstatement.  We were
not engaged to perform an audit of the Fund's  internal  control over  financial
reporting.  Our audits included consideration of internal control over financial
reporting as a basis for designing audit  procedures that are appropriate in the
circumstances,  but  not  for  the  purpose  of  expressing  an  opinion  on the
effectiveness  of  the  Fund's  internal   control  over  financial   reporting.
Accordingly,  we express no such opinion. An audit also includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements and financial  highlights,  assessing the accounting  principles used
and  significant  estimates  made by  management,  and  evaluating  the  overall
financial  statement  presentation.  Our  procedures  included  confirmation  of
securities  owned as of December 31,  2005,  by  correspondence  with the Fund's
custodian and brokers or by other appropriate  auditing procedures where replies
from brokers were not received.  We believe that our audits provide a reasonable
basis for our opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of The
GAMCO Global  Opportunity Fund, a series of GAMCO Global Series Funds,  Inc., at
December 31, 2005, the results of its  operations  for the year then ended,  the
changes in its net assets  for each of the two years in the period  then  ended,
and the  financial  highlights  for each of the three  years in the period  then
ended, in conformity with U.S. generally accepted accounting principles.

                                                           /s/ ERNST & YOUNG LLP

Philadelphia, Pennsylvania
February 14, 2006

                                       16


                        THE GAMCO GLOBAL OPPORTUNITY FUND

BOARD CONSIDERATION AND RE-APPROVAL OF INVESTMENT ADVISORY AGREEMENT (UNAUDITED)

During the six months ended  December  31,  2005,  the Board of Directors of the
Corporation  approved the continuation of the investment advisory agreement with
the Adviser  for the Fund on the basis of the  recommendation  by the  directors
(the "independent  directors") who are not "interested persons" of the Fund. The
following  paragraphs  summarize the material information and factors considered
by the  independent  directors  as well as their  conclusions  relative  to such
factors.

NATURE,  EXTENT AND QUALITY OF SERVICES.  The independent  directors  considered
information  regarding  the  portfolio  managers,  the depth of the analyst pool
available   to  the  Adviser   and  the   portfolio   managers,   the  scope  of
administrative,  shareholder,  and other services  supervised or provided by the
Adviser,  and the absence of significant service problems reported to the Board.
The  independent  directors  noted  the  experience,   length  of  service,  and
reputation of the portfolio managers.

INVESTMENT  PERFORMANCE.  The  independent  directors  reviewed  the  short  and
medium-term  performance  of the Fund  against a peer group of global  multi-cap
core and multi-cap growth funds,  noting the Fund's top half performance for the
one year period,  top quartile  for the three year period,  and bottom  quartile
performance for the five year period.

PROFITABILITY.  The independent  directors  reviewed  summary data regarding the
lack  of  profitability  of  the  Fund  to the  Adviser  both  with  a pro  rata
administrative charge and with a standalone administrative charge. The directors
also noted that an affiliated  broker of the Adviser received  distribution fees
and minor amounts of sales commissions.

ECONOMIES OF SCALE.  The independent  directors  discussed the major elements of
the Adviser's cost structure and the relationship of those elements to potential
economies of scale and reviewed  rudimentary  data suggesting that 20% growth in
the Fund would not produce  meaningful  economies of scale that the shareholders
would not participate in.

SHARING  OF  ECONOMIES  OF  SCALE.  The  independent  directors  noted  that the
investment  advisory  fee  schedule  for the Fund does not take into account any
potential  economies  of scale  that may  develop  or any  losses or  diminished
profitability to the Adviser in prior years.

SERVICE AND COST  COMPARISONS.  The independent  directors  compared the expense
ratios of the investment advisory fee, other expenses, and total expenses of the
Fund to similar  expense  ratios of the peer group of global  multi-cap core and
multi-cap  growth  funds,  and noted that the  Adviser's  advisory  fee includes
substantially  all  administrative  services  of the Fund as well as  investment
advisory  services.  The directors  noted that the Fund's  expense  ratios after
waivers were moderately  higher,  and the Fund's size was  significantly  lower,
than average within this group and that the Adviser had been waiving substantial
portions of its fees in order to make the Fund a more attractive investment. The
directors also noted that the advisory fee structure before waivers was the same
as that in effect for most of the Gabelli  funds.  The directors  were presented
with,  but did not  compare,  the  advisory  fee to the fee for  other  types of
accounts managed by the Adviser.

CONCLUSIONS.  The independent  directors  concluded that the Fund enjoyed highly
experienced portfolio management services,  good ancillary services, and a mixed
performance  record.  The  independent  directors also concluded that the Fund's
expense  ratios  were   reasonable,   particularly  in  light  of  the  lack  of
profitability  to the Adviser of managing the Fund,  and that economies of scale
were not a factor in their thinking at this time. The directors did not view the
potential  profitability of ancillary services as material to their decision. On
the basis of the foregoing and without assigning particular weight to any single
conclusion,  the independent  directors determined to recommend  continuation of
the investment advisory agreement to the full Board of Directors.

                                       17


THE GAMCO GLOBAL OPPORTUNITY FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================

The business and affairs of the Company are managed  under the  direction of the
Company's  Board of  Directors.  Information  pertaining  to the  Directors  and
officers of the Company is set forth below.  The Fund's  Statement of Additional
Information  includes additional  information about The GAMCO Global Opportunity
Fund's  Directors and is available,  without  charge,  upon request,  by calling
800-GABELLI (800-422-3554) or by writing to The GAMCO Global Opportunity Fund at
One Corporate Center, Rye, NY 10580-1422.




                         TERM OF        NUMBER OF
                       OFFICE AND     FUNDS IN FUND
NAME, POSITION(S)       LENGTH OF        COMPLEX
    ADDRESS 1              TIME         OVERSEEN BY       PRINCIPAL OCCUPATION(S)                OTHER DIRECTORSHIPS
    AND AGE              SERVED 2        DIRECTOR         DURING PAST FIVE YEARS                  HELD BY DIRECTOR 4
- ----------------         --------       ----------        ----------------------                  ------------------
                                                                                      
INTERESTED DIRECTORS 3:
- ----------------------
MARIO J. GABELLI       Since 1993          24     Chairman of the Board and Chief Executive      Director of Morgan Group
Director and                                      Officer of GAMCO Investors, Inc.               Holdings, Inc.
Chief Investment Officer                          and Chief Investment Officer - Value           (holding company)
Age: 63                                           Portfolios of Gabelli Funds, LLC and
                                                  GAMCO Asset Management Inc.;
                                                  Chairman and Chief Executive Officer of
                                                  Lynch Interactive  Corporation
                                                  (multimedia and services)

JOHN D. GABELLI        Since 1993          10     Senior Vice President of Gabelli &             Director of
Director                                          Company, Inc.                                  GAMCO Investors, Inc.
Age: 61

NON-INTERESTED DIRECTORS:
- ------------------------
E. VAL  CERUTTI        Since 2001           7     Chief Executive Officer of Cerutti             Director of Lynch
Director                                          Consultants, Inc.; former President            Corporation (diversified
Age: 66                                           and Chief Operating Officer of                 manufacturing)
                                                  Stella D'oro Biscuit Company
                                                  (through 1992); Adviser, Iona
                                                  College School of Business

ANTHONY J. COLAVITA    Since 1993          34     Partner in the law firm of                         --
Director                                          Anthony J. Colavita, P.C.
Age: 70

ARTHUR V. FERRARA      Since 2001           6     Formerly, Chairman of the Board and Chief      Director/Trustee of
Director                                          Executive Officer of The Guardian Life         25 mutual funds within the
Age: 75                                           Insurance Company of America from January      Guardian Fund Complex
                                                  1993 to December 1995; President, Chief
                                                  Executive Officer and a Director prior thereto

WERNER J. ROEDER, MD   Since 1993          23     Medical Director of Lawrence Hospital              --
Director                                          and practicing private physician
Age: 65

ANTHONIE C. VAN EKRIS  Since 1993          18     Chairman of BALMAC International, Inc.             --
Director                                          (commodities and futures trading)
Age: 71

SALVATORE J. ZIZZA     Since 2004          25     Chairman, Hallmark Electrical Supplies Corp.   Director of Hollis-Eden
Director                                                                                         Pharmaceuticals
Age: 60                                                                                          (biotechnology);
                                                                                                 Director of Earl Scheib,
                                                                                                 Inc. (automotive services)

                                       18


THE GAMCO GLOBAL OPPORTUNITY FUND
ADDITIONAL FUND INFORMATION (CONTINUED) (UNAUDITED)
================================================================================




                         TERM OF
                       OFFICE AND
NAME, POSITION(S)       LENGTH OF
    ADDRESS 1              TIME                  PRINCIPAL OCCUPATION(S)
    AND AGE              SERVED 2                DURING PAST FIVE YEARS
- ----------------         --------                ----------------------
                                         

OFFICERS:
- --------
BRUCE N. ALPERT          Since 2003            Executive Vice President and Chief Operating and
President and Treasurer                        Officer of Gabelli Funds, LLC since 1988 and
Age: 54                                        an officer of all of the registered investment companies
                                               in the Gabelli Funds complex. Director and President of
                                               Gabelli Advisers, Inc. since 1998.

JAMES E. MCKEE           Since 1995            Vice President, General Counsel and Secretary of
Secretary                                      GAMCO Investors, Inc. since 1999 and GAMCO
Age: 42                                        Asset Management Inc. since 1993; Secretary of all of
                                               the registered investment companies in the Gabelli
                                               Funds complex.

PETER D. GOLDSTEIN       Since 2004            Director of Regulatory Affairs for GAMCO Investors, Inc.
Chief Compliance Officer                       since 2004; Chief Compliance Officer of all of the registered
Age: 52                                        investment companies in the Gabelli Funds complex; Vice
                                               President of Goldman Sachs Asset Management from 2000
                                               through 2004.


- ----------------
 1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
 2 Each Director  will hold office for an indefinite  term until the earliest of
   (i) the next  meeting of  shareholders,  if any,  called  for the  purpose of
   considering  the  election  or  re-election  of such  Director  and until the
   election and  qualification of his or her successor,  if any, elected at such
   meeting,  or (ii) the date a Director  resigns or  retires,  or a Director is
   removed by the Board of Directors or  shareholders,  in  accordance  with the
   Company's  By-Laws and  Articles of  Incorporation.  Each  officer  will hold
   office for an indefinite  term until the date he or she resigns or retires or
   until his or her successor is elected and qualified.  Effective  November 16,
   2005, Mr. Karl Otto Pohl resigned from the Board  of Directors and now serves
   as Director Emeritus.
 3 "Interested  person" of the Company as defined in the Investment  Company Act
   of 1940. Messrs. M. Gabelli and J. Gabelli are each considered an "interested
   person" because of their  affiliation  with Gabelli Funds,  LLC which acts as
   the Company's  investment  adviser.  Mario J. Gabelli and John D. Gabelli are
   brothers.
 4 This column includes only  directorships  of companies  required to report to
   the SEC under the Securities  Exchange Act of 1934 (i.e. public companies) or
   other investment companies registered under the 1940 Act.

                                       19


THE GAMCO GLOBAL OPPORTUNITY FUND
ADDITIONAL FUND INFORMATION (CONTINUED) (UNAUDITED)
================================================================================

- --------------------------------------------------------------------------------
                   2005 TAX NOTICE TO SHAREHOLDERS (Unaudited)

  For the year  ended  December  31,  2005,  the Fund paid to  shareholders,  an
  ordinary income dividend  (comprised of net investment income) totaling $0.023
  and  $0.036  per share for Class AAA and Class A,  respectively.  For the year
  ended December 31, 2005, 53.24% of the distribution qualifies for the dividend
  received deduction available to corporations,  and 100% of the ordinary income
  distribution was qualified  dividend income.  Also for the year ended December
  31, 2005, the Fund passed through  foreign tax credits of $0.0210 per share to
  Class AAA and Class A  shareholders. The foreign source income and tax credits
  by country are presented in the table below.  Visit  www.gabelli.com  for more
  information about 2005 foreign source income and foreign taxes paid.

  U.S. GOVERNMENT INCOME:
  The percentage of the ordinary  income dividend paid by the Fund during fiscal
  year 2005 which was derived  from U.S.  Treasury  securities  was 4.39%.  Such
  income is exempt from state and local tax in all states. However, many states,
  including New York and California,  allow a tax exemption for a portion of the
  income earned only if a mutual fund has invested at least 50% of its assets at
  the  end of  each  quarter  of the  Fund's  fiscal  year  in  U.S.  Government
  securities.  The  GAMCO  Global  Opportunity  Fund  did not meet  this  strict
  requirement  in 2005.  Due to the  diversity in state and local tax law, it is
  recommended that you consult your personal tax advisor as to the applicability
  of the information provided to your specific situation.
- --------------------------------------------------------------------------------

      FOREIGN SOURCE INCOME AND TAX CREDITS BY COUNTRY FOR 2005 (UNAUDITED)

                        THE GAMCO GLOBAL OPPORTUNITY FUND
                        ---------------------------------

                            Foreign Source    Foreign Qualified
                               Income %           Income %         Foreign Tax %
                               --------           --------         -------------

       Australia                 4.94              6.02               0.00
       Austria                   0.00              0.00               0.00
       Brazil                    2.34              2.86               4.03
       Canada                    1.41              1.72               3.20
       Denmark                   0.00              0.00               0.00
       Finland                   0.00              0.00               0.00
       France                   17.56             21.39              26.55
       Germany                   1.58              1.92               6.02
       Hong Kong                 0.00              0.00               0.00
       Ireland                   9.09             11.08               0.00
       Italy                     7.21              8.79              14.66
       Japan                     9.01             10.98               9.10
       Luxembourg                1.52              1.85               3.26
       Malaysia                  0.00              0.00               0.00
       Netherlands               0.75              0.91               0.00
       Spain                     3.89              4.74               8.64
       Singapore                 0.00              0.00               0.00
       South Africa              1.81              2.20               0.00
       Sweden                    0.21              0.26               0.46
       Switzerland              11.04             13.45              24.09
       United Kingdom            5.40              6.64               0.00

                                       20


- --------------------------------------------------------------------------------
     GABELLI FUNDS AND YOUR PERSONAL PRIVACY
================================================================================

     WHO ARE WE?
     The  Gabelli/GAMCO  Funds  are  investment  companies  registered  with the
     Securities  and Exchange  Commission  under the  Investment  Company Act of
     1940.  We are managed by Gabelli  Funds,  LLC and Gabelli  Advisers,  Inc.,
     which are affiliated with GAMCO Investors,  Inc. GAMCO Investors, Inc. is a
     publicly  held  company  that  has  subsidiaries  that  provide  investment
     advisory or brokerage services for a variety of clients.

     WHAT KIND OF NON-PUBLIC INFORMATION DO WE COLLECT ABOUT YOU IF YOU BECOME A
     GABELLI  CUSTOMER?
     If you apply to open an  account  directly  with us,  you will be giving us
     some non-public  information about yourself.  The non-public information we
     collect about you is:

     o  INFORMATION  YOU GIVE US ON YOUR  APPLICATION  FORM.  This could include
        your name,  address,  telephone  number,  social security  number,  bank
        account number, and other information.

     o  INFORMATION  ABOUT YOUR  TRANSACTIONS WITH US, ANY TRANSACTIONS WITH OUR
        AFFILIATES,  AND  TRANSACTIONS  WITH  THE  ENTITIES  WE HIRE TO  PROVIDE
        SERVICES TO YOU.  This would include  information  about the shares that
        you buy or redeem, and the deposits and withdrawals that you make. If we
        hire someone else to provide  services--like  a transfer  agent--we will
        also have information  about the  transactions  that you conduct through
        them.

     WHAT INFORMATION DO WE DISCLOSE AND TO WHOM DO WE DISCLOSE IT?
     We do not disclose any non-public personal  information about our customers
     or former  customers  to anyone,  other than our  affiliates,  our  service
     providers who need to know such information,  and as otherwise permitted by
     law. If you want to find out what the law permits, you can read the privacy
     rules adopted by the Securities and Exchange Commission. They are in volume
     17 of the Code of Federal Regulations, Part 248. The Commission often posts
     information about its regulations on its web site, www.sec.gov.

     WHAT DO WE DO TO PROTECT YOUR PERSONAL INFORMATION?
     We restrict  access to  non-public  personal  information  about you to the
     people who need to know that  information  in order to provide  services to
     you or the Fund and to ensure that we are complying with the laws governing
     the securities business. We maintain physical,  electronic,  and procedural
     safeguards to keep your personal information confidential.
- --------------------------------------------------------------------------------


                             GABELLI FAMILY OF FUNDS

VALUE ________________________________________
GABELLI ASSET FUND
Seeks to invest primarily in a diversified portfolio of common stocks selling at
significant  discounts  to  their  private  market  value.  The  Fund's  primary
objective is growth of capital. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI BLUE CHIP VALUE FUND
Seeks long term growth of capital  through  investment  primarily  in the common
stocks of established  companies which are temporarily out of favor.  The fund's
objective  is to  identify a catalyst or sequence of events that will return the
company to a higher value.
(MULTICLASS)                              PORTFOLIO MANAGER: BARBARA MARCIN, CFA

WESTWOOD EQUITY FUND
Seeks to invest  primarily in the common stock of  well-seasoned  companies that
have  recently  reported  positive  earnings  surprises  and are  trading  below
Westwood's  proprietary  growth rate estimates.  The Fund's primary objective is
capital appreciation.
(MULTICLASS)                                   PORTFOLIO MANAGER: SUSAN M. BYRNE

FOCUSED VALUE ______________________________
GABELLI VALUE FUND
Seeks to invest in  securities  of  companies  believed to be  undervalued.  The
Fund's primary objective is long-term capital appreciation. (MULTICLASS)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

SMALL CAP VALUE ____________________________
GABELLI SMALL CAP FUND
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  less  than $1  billion)  believed  to have  rapid  revenue  and
earnings growth potential. The Fund's primary objective is capital appreciation.
(MULTICLASS)                            PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD SMALLCAP EQUITY FUND
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $2.5 billion or less. The Fund's primary  objective is long-term capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GABELLI WOODLAND SMALL CAP VALUE FUND
Seeks to invest  primarily  in the common  stocks of smaller  companies  (market
capitalizations  less  than  $1.5  billion)  believed  to  be  undervalued  with
shareholder  oriented management teams that are employing strategies to grow the
company's  value.  The  Fund's  primary   objective  is  capital   appreciation.
(MULTICLASS)                          PORTFOLIO MANAGER: ELIZABETH M. LILLY, CFA

GROWTH ______________________________________
GAMCO GROWTH FUND
Seeks to invest  primarily in large cap stocks believed to have  favorable,  yet
undervalued,  prospects for earnings  growth.  The Fund's  primary  objective is
capital appreciation. (MULTICLASS)        PORTFOLIO MANAGER: HOWARD F. WARD, CFA

GAMCO INTERNATIONAL GROWTH FUND
Seeks to invest in the equity  securities  of  foreign  issuers  with  long-term
capital   appreciation    potential.    The   Fund   offers   investors   global
diversification. (MULTICLASS)                    PORTFOLIO MANAGER: CAESAR BRYAN

AGGRESSIVE GROWTH _________________________
GAMCO GLOBAL GROWTH FUND
Seeks capital appreciation through a disciplined  investment program focusing on
the globalization and interactivity of the world's marketplace. The Fund invests
in  companies  at the  forefront  of  accelerated  growth.  The  Fund's  primary
objective is capital appreciation. (MULTICLASS)                     TEAM MANAGED

MICRO-CAP ___________________________________
WESTWOOD MIGHTY MITES(SM) FUND
Seeks to invest in micro-cap companies that have market  capitalizations of $300
million or less. The Fund's primary objective is long-term capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

EQUITY INCOME _______________________________
GABELLI EQUITY INCOME FUND
Seeks to invest primarily in equity securities with above market average yields.
The Fund pays monthly  dividends  and seeks a high level of total return with an
emphasis on income. (MULTICLASS)        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

WESTWOOD BALANCED FUND
Seeks to invest in a balanced and diversified portfolio of stocks and bonds. The
Fund's primary objective is both capital appreciation and current income.
(MULTICLASS)                            CO-PORTFOLIO MANAGERS: SUSAN M. BYRNE
                                                               MARK FREEMAN, CFA

WESTWOOD INCOME FUND
Seeks to  provide   a high level of  current income as well as long-term capital
appreciation  by  investing  in   income   producing  equity  and  fixed  income
securities. (MULTICLASS)                       PORTFOLIO MANAGER: SUSAN M. BYRNE

SPECIALTY EQUITY ____________________________
GAMCO GLOBAL CONVERTIBLE SECURITIES FUND
Seeks to invest  principally in bonds and preferred stocks which are convertible
into  common  stock of  foreign  and  domestic  companies.  The  Fund's  primary
objective is total return  through a combination  of current  income and capital
appreciation. (MULTICLASS)                                          TEAM MANAGED

GAMCO GLOBAL OPPORTUNITY FUND
Seeks to invest in common stock of companies which have rapid growth in revenues
and  earnings  and  potential  for above  average  capital  appreciation  or are
undervalued. The Fund's primary objective is capital appreciation.
(MULTICLASS)                                                        TEAM MANAGED

SECTOR ______________________________________
GAMCO GLOBAL TELECOMMUNICATIONS FUND
Seeks to invest in telecommunications companies throughout the world - targeting
undervalued  companies with strong  earnings and cash flow dynamics.  The Fund's
primary objective is capital appreciation. (MULTICLASS)             TEAM MANAGED

GAMCO GOLD FUND
Seeks to invest in a global  portfolio of equity  securities  of gold mining and
related  companies.  The Fund's  objective  is long-term  capital  appreciation.
Investment in gold stocks is considered speculative and is affected by a variety
of world-wide economic, financial, and political factors. (MULTICLASS)
                                                 PORTFOLIO MANAGER: CAESAR BRYAN

GABELLI UTILITIES FUND
Seeks to provide a high level of total return  through a combination  of capital
appreciation and current income. (MULTICLASS)                       TEAM MANAGED

MERGER AND ARBITRAGE _____________________
GABELLI ABC FUND
Seeks to invest in securities with attractive  opportunities for appreciation or
investment  income.  The Fund's  primary  objective  is total  return in various
market conditions without excessive risk of capital loss.
(NO-LOAD)                               PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

CONTRARIAN_________________________________
GAMCO MATHERS FUND
Seeks  long-term  capital  appreciation  in various  market  conditions  without
excessive risk of capital loss. (CLASS AAA-NO-LOAD)
                                        PORTFOLIO MANAGER: HENRY VAN DER EB, CFA

COMSTOCK CAPITAL VALUE FUND
Seeks capital  appreciation and current income.  The Fund may use either long or
short positions to achieve its objective.
(MULTICLASS)                               PORTFOLIO MANAGER: MARTIN WEINER, CFA

COMSTOCK STRATEGY FUND
The Fund emphasizes investments in debt securities,  which maximize total return
in light of credit risk,  interest rate risk, and the risk  associated  with the
length of maturity of the debt instrument. (MULTICLASS)
                                           PORTFOLIO MANAGER: MARTIN WEINER, CFA

FIXED INCOME ________________________________
WESTWOOD INTERMEDIATE BOND FUND
Seeks to invest in a diversified portfolio of bonds with various maturities. The
Fund's primary objective is total return.
(MULTICLASS)                                PORTFOLIO MANAGER: MARK FREEMAN, CFA

CASH MANAGEMENT-MONEY MARKET __________
GABELLI U.S. TREASURY MONEY MARKET FUND
Seeks to invest exclusively in short-term U.S. Treasury  securities.  The Fund's
primary  objective  is to  provide  high  current  income  consistent  with  the
preservation of principal and liquidity. (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI

AN INVESTMENT IN THE ABOVE MONEY MARKET FUND  IS NEITHER  INSURED NOR GUARANTEED
BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT AGENCY.  ALTHOUGH
THE FUND SEEKS TO PRESERVE THE VALUE OF YOUR  INVESTMENT AT $1.00 PER SHARE,  IT
IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUND.

THE GLOBAL FUNDS INVEST IN FOREIGN SECURITIES WHICH INVOLVE RISKS NOT ORDINARILY
ASSOCIATED WITH INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING CURRENCY FLUCTUATION,
ECONOMIC, AND POLITICAL RISKS.

 TO RECEIVE A PROSPECTUS, CALL 800-GABELLI (422-3554). INVESTORS SHOULD CONSIDER
THE INVESTMENT OBJECTIVES, RISKS, AND CHARGES AND EXPENSES OF THE FUND CAREFULLY
       BEFORE INVESTING. THE PROSPECTUS CONTAINS MORE COMPLETE INFORMATION
   ABOUT THIS AND OTHER MATTERS AND SHOULD BE READ CAREFULLY BEFORE INVESTING.


                         GAMCO Global Series Funds, Inc.
                        THE GAMCO GLOBAL OPPORTUNITY FUND
                              One Corporate Center
                            Rye, New York 10580-1422
                                   800-GABELLI
                                  800-422-3554
                                FAX: 914-921-5118
                            WEBSITE: WWW.GABELLI.COM
                            E-MAIL: INFO@GABELLI.COM
                   Net Asset Value available daily by calling
                           800-GABELLI after 6:00 P.M.

                               BOARD OF DIRECTORS

Mario J. Gabelli, CFA                              John D. Gabelli
CHAIRMAN AND CHIEF                                 SENIOR VICE PRESIDENT
EXECUTIVE OFFICER                                  GABELLI & COMPANY, INC.
GAMCO INVESTORS, INC.

E. Val Cerutti                                     Werner J. Roeder, MD
CHIEF EXECUTIVE OFFICER                            MEDICAL DIRECTOR
CERUTTI CONSULTANTS, INC.                          LAWRENCE HOSPITAL

Anthony J. Colavita                                Anthonie C. van Ekris
ATTORNEY-AT-LAW                                    MANAGING DIRECTOR
ANTHONY J. COLAVITA, P.C.                          BALMAC INTERNATIONAL, INC.

Arthur V. Ferrara                                  Salvatore J. Zizza
FORMER CHAIRMAN AND                                CHAIRMAN
CHIEF EXECUTIVE OFFICER                            HALLMARK ELECTRICAL
GUARDIAN LIFE INSURANCE                            SUPPLIES CORP.
COMPANY OF AMERICA

                                    OFFICERS

Bruce N. Alpert                                    James E. McKee
PRESIDENT AND TREASURER                            SECRETARY

Peter D. Goldstein
CHIEF COMPLIANCE OFFICER

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP



- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
GAMCO  Global  Opportunity  Fund.  It is  not  authorized  for  distribution  to
prospective investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB403Q405SR



                                                                           GAMCO


                                                         THE
                                                         GAMCO
                                                         GLOBAL
                                                         OPPORTUNITY
                                                         FUND


                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2005


                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND

                                  ANNUAL REPORT
                               DECEMBER 31, 2005


TO OUR SHAREHOLDERS,

      The Sarbanes-Oxley Act requires a Fund's principal executive and financial
officers  to  certify  the  entire   contents  of  the  semi-annual  and  annual
shareholder  reports in a filing with the Securities and Exchange  Commission on
Form N-CSR. This certification  would cover the portfolio  manager's  commentary
and  subjective  opinions  if they are  attached  to or a part of the  financial
statements. Many of these comments and opinions would be difficult or impossible
to certify.

      Because we do not want our portfolio  managers to eliminate their opinions
and/or  restrict their  commentary to historical  facts, we have separated their
commentary from the financial  statements and investment portfolio and have sent
it to  you  separately.  Both  the  commentary  and  the  financial  statements,
including  the  portfolio  of  investments,  will be available on our website at
www.gabelli.com/funds.

      Enclosed are the audited financial statements and the investment portfolio
as of  December  31,  2005 with a  description  of  factors  that  affected  the
performance during the past year.

PERFORMANCE DISCUSSION

      The  GAMCO  Global   Telecommunications  Fund  gained  2.84%  in  2005,  a
significant  outperformance of the S&P/Citigroup Global Telecommunications Broad
Market Index that  declined by 0.89% for the year.  The two primary  sources for
the superior  performance  versus the index were the contributions from wireless
operators, and exposure to non-U.S.  holdings.  Among top Fund holdings,  Rogers
Communications  Inc.,  America Movil SA de CV, Telus Corp., and O2 plc (acquired
by Telefonica) realized substantial share price outperformance.

      Other holdings that contributed to returns in 2005 were telecommunications
companies in emerging  markets.  The best  performing  emerging  market  telecom
stocks in our portfolio  were China Mobile (Hong  Kong) Ltd. (+40%),  Philippine
Long  Distance  Telephone  Co.  (+34%),  Telefonos  De Mexico Sa de CV (+28.8%),
Vimpel Communications (+22.4%), and Telecom Argentina SA(+17.6%).  Communication
equipment  makers need to be noted as they  rebounded in the past twelve months.
Significant  Fund holdings in this sector that  contributed to returns  included
Furukawa Electric Co. Ltd. (+64.3%), Motorola Inc. (+31.3%),  Scientific Atlanta
Inc. (+30.5%) which was acquired by Cisco in 2005, and Nokia Corp. (+16.8%).

      Laggards in the past year  included a number of  holdings in the  regional
and national telecommunications sectors. Among the regional and national telecom
companies that hurt the Fund's return in 2005 were Telephone & Data Systems Inc.
(-53.2%),  Commonwealth Telephone Enterprises Inc. (-32.0%), Deutsche Telekom AG
(-26.7%),  Verizon Communications Inc. (-25.7%), France Telecom SA (-24.9%), and
Swisscom AG (-20.3%). Cable and satellite holdings Echostar Communications Corp.
(-18.3%),  DIRECTV Group Inc.  (-15.7%),  and Cablevision  Systems Corp. (-5.7%)
also underperformed.

      In general, 2005 was a difficult year for the telecommunications industry.
Despite the continuation of industry  consolidation,  which saw the acquisitions
of the major U.S. long distance carriers,  AT&T Inc. and MCI Inc., sentiment for
the group remained generally negative. There is a general market perception that
growth  prospects and margins for  integrated  and wireless  operators and cable
companies  may  have  peaked.   Pricing  pressures  are  coming  not  only  from
intensifying competition, but equally or more so from technological change. 2005
marked the first year in which the shift to VoIP (Voice over Internet  Protocol)
became a  significant  issue.  In its essence,  the change  heralds the era when
calling  will no longer be  charged  on a  per-minute  basis,  or  according  to
distance.  As voice revenue  declines at an  accelerating  pace, the question is
whether  operating costs can move in parallel,  particularly  for operators that
have already undertaken years of efficiency and productivity measures.


      Not all the news  flow  during  2005  was bad.  The  uptake  of  broadband
services in developed markets continues apace, with ever-increasing transmission
speeds being offered by telecom  companies,  cable operators and new competitive
entrants.  This  trend  is also  accompanied  by the  uptake  of  `Triple  Play'
offerings of video/entertainment  services, high-speed Internet connectivity and
traditional voice telephony delivered by a single provider. The aggressive moves
of U.S. Regional Bell Operating Companies and, more recently, European incumbent
operators  into  video   services  via  either  DSL  networks  or   increasingly
fiber-to-the-home  (IPTV) offers the potential to create new revenue  streams to
supplant  the decline of voice.  While  stepping up capital  spending  levels to
enable these new technologies,  overall debt levels in the industry continued to
decline, leaving balance sheet flexibility that allowed dividends to grow, share
buybacks,  and acquisitive  growth/consolidation  to boost top line performance.
Developing markets saw continued dramatic growth in wireless  subscriber numbers
in 2005, aided by low priced handsets.  Finally,  after many false starts,  2005
marked the beginnings of 3rd generation (3G) wireless networks beginning to gain
traction.

      Weak fundamentals in the telecommunications  drove investors away from the
sector during 2005,  and left industry  valuations  at, or near,  all-time lows.
Nevertheless,  the GAMCO  Global  Telecommunications  Fund was able to deliver a
positive return through stock selection,  non-index weightings and focusing on a
number of special situations.

                                                           Sincerely yours,

                                                           /s/ Bruce N. Alpert

                                                           Bruce N. Alpert
                                                           President
February 13, 2006


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)
The following table presents portfolio holdings as a percent of total net assets
as of December 31, 2005:



THE GAMCO GLOBAL TELECOMMUNICATIONS FUND

Wireless Communications .......................  25.3%
Telecommunications: National ..................  24.4%
Telecommunications: Regional ..................  16.9%
Cable .........................................   9.3%
Entertainment .................................   6.0%
Telecommunications: Long Distance .............   5.7%
Communications Equipment ......................   3.2%
Satellite .....................................   2.7%
Diversified Industrial ........................   2.0%
Business Services .............................   1.6%
Computer Software and Services ................   0.9%
Publishing ....................................   0.6%
Broadcasting ..................................   0.5%
Energy and Utilities ..........................   0.5%
Telecommunications: Broadband .................   0.3%
Electronics ...................................   0.2%
Equipment and Supplies ........................   0.2%
Other Assets and Liabilities - (Net) ..........  (0.3)%
                                                ------
                                                100.0%
                                                ======


THE FUND FILES A COMPLETE  SCHEDULE OF PORTFOLIO  HOLDINGS  WITH THE SEC FOR THE
FIRST AND THIRD  QUARTERS OF EACH FISCAL YEAR ON FORM N-Q, THE LAST OF WHICH WAS
FILED FOR THE QUARTER  ENDED  SEPTEMBER 30, 2005.  SHAREHOLDERS  MAY OBTAIN THIS
INFORMATION   AT   WWW.GABELLI.COM   OR  BY  CALLING  THE  FUND  AT  800-GABELLI
(800-422-3554).  THE  FUND'S  FORM N-Q IS  AVAILABLE  ON THE  SEC'S  WEBSITE  AT
WWW.SEC.GOV  AND MAY ALSO BE  REVIEWED  AND  COPIED AT THE  COMMISSION'S  PUBLIC
REFERENCE  ROOM IN  WASHINGTON,  DC.  INFORMATION ON THE OPERATION OF THE PUBLIC
REFERENCE ROOM MAY BE OBTAINED BY CALLING 1-800-SEC-0330.


PROXY VOTING

The Fund files Form N-PX with its complete proxy voting record for the 12 months
ended June 30th,  no later than August 31st of each year. A  description  of the
Fund's  proxy  voting  policies,  procedures,  and how the  Fund  voted  proxies
relating to portfolio securities are available without charge, upon request, (i)
by calling 800-GABELLI  (800-422-3554);  (ii) by writing to The Gabelli Funds at
One Corporate Center,  Rye, NY 10580-1422;  and (iii) by visiting the Securities
and Exchange Commission's website at www.sec.gov.

                                       2


                               [GRAPHIC OMITTED]
                              PLOT POINTS FOLLOW:


       COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN THE GAMCO
   GLOBAL TELECOMMUNICATIONS FUND CLASS AAA SHARES, THE S&P/CITIGROUP GLOBAL
           TELECOMMUNICATIONS INDEX AND THE MSCI AC WORLD FREE INDEX

                GAMCO Global
          Telecommunications Fund   S&P/Citigroup Global          MSCI AC World
             Class AAA Shares     Telecommunications Index          Free Index
11/1/93         $10,000                    $10,000                   $10,000
12/31/93         10,300                     10,045                     9,993
12/31/94          9,921                      9,555                    10,496
12/31/95         11,524                     10,794                    12,538
12/31/96         12,560                     12,307                    14,193
12/31/97         16,563                     15,011                    16,321
12/31/98         22,319                     21,612                    19,907
12/31/99         40,234                     37,987                    25,246
12/31/00         30,546                     21,208                    21,727
12/31/01         24,214                     14,937                    18,270
12/31/02         17,051                     10,720                    14,803
12/31/03         24,337                     15,030                    19,929
12/31/04         30,025                     18,599                    23,067
12/31/05         30,878                     18,434                    25,690

PAST PERFORMANCE IS NOT PREDICTIVE OF FUTURE RESULTS. The performance tables and
graph do not reflect the deduction of taxes that a shareholder would pay on fund
distributions or the redemption of fund shares.


COMPARATIVE RESULTS
- --------------------------------------------------------------------------------


                                AVERAGE ANNUAL RETURNS THROUGH DECEMBER 31, 2005 (A)
                                ----------------------------------------------------
                                                                                                             Since
                                                                                                           Inception
                                                  QUARTER      1 YEAR    3 YEAR      5 YEAR      10 YEAR   (11/1/93)
- --------------------------------------------------------------------------------------------------------------------
                                                                                              
  GAMCO GLOBAL TELECOMMUNICATIONS FUND
      CLASS AAA ................................ (0.95)%       2.84%     21.89%      0.22%         10.36%       9.70%
  S&P/Citigroup Global
      Telecommunications Broad Market Index .... (3.16)       (0.89)     19.22      (2.70)           N/A*       N/A*
  MSCI AC World Free Index .....................  3.43        11.37      20.18       3.41           7.44        8.06
  Class A ...................................... (0.97)        2.82      21.86       0.22          10.36        9.71
                                                 (6.66)(b)    (3.09)(b)  19.48(b)   (0.95)(b)       9.71(b)     9.17(b)
  Class B ...................................... (1.16)        2.03      20.95      (0.53)          9.91        9.34
                                                 (6.10)(c)    (2.97)(c)  20.26(c)   (0.93)(c)       9.91(c)     9.34(c)
  Class C ...................................... (1.22)        1.97      20.95      (0.54)          9.90        9.33
                                                 (2.21)(c)     0.97(c)   20.95(c)   (0.54)(c)       9.90(c)     9.33(c)


 (a) RETURNS  REPRESENT PAST  PERFORMANCE  AND DO NOT GUARANTEE  FUTURE RESULTS.
     TOTAL RETURNS AND AVERAGE ANNUAL RETURNS REFLECT CHANGES IN SHARE PRICE AND
     REINVESTMENT  OF  DIVIDENDS  AND  DISTRIBUTIONS  AND ARE  NET OF  EXPENSES.
     INVESTMENT RETURNS AND THE PRINCIPAL VALUE OF AN INVESTMENT WILL FLUCTUATE.
     CURRENT  PERFORMANCE  MAY BE LOWER OR  HIGHER  THAN  THE  PERFORMANCE  DATA
     PRESENTED.  WHEN SHARES ARE  REDEEMED,  THEY MAY BE WORTH MORE OR LESS THAN
     THEIR ORIGINAL COST.  PERFORMANCE RETURNS FOR PERIODS LESS THAN ONE YEAR IS
     NOT ANNUALIZED. VISIT WWW.GABELLI.COM FOR PERFORMANCE INFORMATION AS OF THE
     MOST RECENT MONTH END. INVESTORS SHOULD CONSIDER THE INVESTMENT OBJECTIVES,
     RISKS,  CHARGES,  AND EXPENSES OF THE FUND CAREFULLY BEFORE INVESTING.  THE
     PROSPECTUS  CONTAINS  MORE  INFORMATION  ABOUT THIS AND OTHER  MATTERS  AND
     SHOULD BE READ CAREFULLY BEFORE INVESTING.  THE CLASS AAA SHARES' NET ASSET
     VALUES  ARE USED TO  CALCULATE  PERFORMANCE  FOR THE  PERIODS  PRIOR TO THE
     ISSUANCE OF CLASS A SHARES,  CLASS B SHARES AND CLASS C SHARES ON MARCH 12,
     2000, MARCH 13, 2000 AND JUNE 2, 2000, RESPECTIVELY. THE ACTUAL PERFORMANCE
     FOR THE CLASS B SHARES AND CLASS C SHARES  WOULD HAVE BEEN LOWER DUE TO THE
     ADDITIONAL EXPENSES  ASSOCIATED WITH THESE CLASSES OF SHARES.  INVESTING IN
     FOREIGN   SECURITIES   INVOLVES  RISKS  NOT  ORDINARILY   ASSOCIATED   WITH
     INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING CURRENCY  FLUCTUATION,  ECONOMIC
     AND POLITICAL RISKS. THE S&P/CITIGROUP GLOBAL  TELECOMMUNICATIONS INDEX AND
     THE MSCI AC WORLD  FREE  INDEX ARE  UNMANAGED  INDICATORS  OF GLOBAL  STOCK
     MARKET PERFORMANCE.
 (b) INCLUDES THE EFFECT OF  THE MAXIMUM  5.75% SALES CHARGE AT THE BEGINNING OF
     THE PERIOD.
 (c) INCLUDES THE EFFECT OF THE  APPLICABLE  CONTINGENT DEFERRED SALES CHARGE AT
     THE END OF THE PERIOD  SHOWN FOR CLASS B AND CLASS C SHARES,  RESPECTIVELY.
     CLASS B SHARES ARE NOT AVAILABLE FOR NEW PURCHASES.
   * INFORMATION FOR THE S&P CITIGROUP  GLOBAL  TELECOMMUNICATIONS  BROAD MARKET
     INDEX IS NOT AVAILABLE PRIOR TO JANUARY 1, 2000.
- --------------------------------------------------------------------------------

                                       3


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
DISCLOSURE  OF FUND  EXPENSES  (UNAUDITED)
For the Six Month Period from July 1, 2005 through December 31, 2005
                                                                   EXPENSE TABLE
================================================================================

We believe it is important for you to understand the impact of fees and expenses
regarding  your  investment.  All mutual  funds have  operating  expenses.  As a
shareholder  of a fund,  you  incur  ongoing  costs,  which  include  costs  for
portfolio  management,  administrative  services,  and shareholder reports (like
this one), among others.  Operating  expenses,  which are deducted from a fund's
gross income,  directly  reduce the investment  return of a fund.  When a fund's
expenses are expressed as a percentage of its average net assets, this figure is
known as the expense  ratio.  The  following  examples  are intended to help you
understand  the  ongoing  costs (in  dollars) of  investing  in your Fund and to
compare these costs with those of other mutual funds.  The examples are based on
an  investment  of $1,000 made at the beginning of the period shown and held for
the entire period.

The Expense Table below illustrates your Fund's costs in two ways:

ACTUAL FUND  RETURN:  This section  provides  information  about actual  account
values and actual expenses. You may use this section to help you to estimate the
actual  expenses that you paid over the period after any fee waivers and expense
reimbursements.  The "Ending  Account  Value"  shown is derived  from the Fund's
ACTUAL return during the past six months,  and the "Expenses Paid During Period"
shows the dollar  amount  that would have been paid by an  investor  who started
with $1,000 in the Fund. You may use this information,  together with the amount
you invested, to estimate the expenses that you paid over the period.

To do so, simply  divide your account  value by $1,000 (for  example,  an $8,600
account value  divided by $1,000 = 8.6),  then multiply the result by the number
given for your Fund under the heading  "Expenses Paid During Period" to estimate
the expenses you paid during this period.

HYPOTHETICAL 5% RETURN:  This section provides  information  about  hypothetical
account  values and  hypothetical  expenses  based on the Fund's actual  expense
ratio. It assumes a hypothetical  annualized return of 5% before expenses during
the period shown. In this case - because the hypothetical return used is NOT the
Fund's  actual  return - the  results  do not apply to your  investment  and you
cannot use the  hypothetical  account  value and expense to estimate  the actual
ending  account  balance or expenses  you paid for the period.  This  example is
useful in making  comparisons  of the ongoing costs of investing in the Fund and
other  funds.  To do so,  compare  this  5%  hypothetical  example  with  the 5%
hypothetical examples that appear in shareholder reports of other funds.

Please note that the  expenses  shown in the table are meant to  highlight  your
ongoing  costs only and do not  reflect  any  transactional  costs such as sales
charges (loads),  redemption fees, or exchange fees, if any, which are described
in the Prospectus. If these costs were applied to your account, your costs would
be higher.  Therefore, the 5% hypothetical return is useful in comparing ongoing
costs only,  and will not help you determine the relative  total costs of owning
different funds. The "Annualized  Expense Ratio"  represents the actual expenses
for the last six  months  and may be  different  from the  expense  ratio in the
Financial Highlights which is for the year ended December 31, 2005.

                    Beginning       Ending       Annualized     Expenses
                  Account Value  Account Value     Expense     Paid During
                    07/01/05       12/31/05         Ratio        Period*
- --------------------------------------------------------------------------------
THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Class AAA          $1,000.00       $1,052.20        1.58%        $ 8.17
Class A            $1,000.00       $1,052.70        1.58%        $ 8.17
Class B            $1,000.00       $1,048.40        2.33%        $12.03
Class C            $1,000.00       $1,048.00        2.32%        $11.98

HYPOTHETICAL 5% RETURN
Class AAA          $1,000.00       $1,017.24        1.58%        $ 8.03
Class A            $1,000.00       $1,017.24        1.58%        $ 8.03
Class B            $1,000.00       $1,013.46        2.33%        $11.82
Class C            $1,000.00       $1,013.51        2.32%        $11.77

*  Expenses are equal to the Fund's  annualized  expense  ratio for the last six
   months multiplied by the average account value over the period, multiplied by
   the number of days in the most recent fiscal half-year, then divided by 365.

                                       4



THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              COMMON STOCKS -- 100.3%
              BROADCASTING -- 0.5%
      23,566  CanWest Global
                Communications Corp.+ ............ $    322,321   $    194,420
      35,434  CanWest Global Communications
                Corp., Cl. A+ ....................      407,389        292,629
       1,400  Claxson Interactive Group Inc.+ ....        2,240          5,950
      10,000  Cogeco Inc. ........................      195,069        206,460
       7,000  Fisher Communications Inc.+ ........      353,932        290,010
      35,000  Paxson Communications Corp.+ .......      134,000         31,500
                                                   ------------   ------------
                                                      1,414,951      1,020,969
                                                   ------------   ------------
              BUSINESS SERVICES -- 1.6%
      75,000  AFK Sistema, GDR (a) ...............    1,275,000      1,781,250
       9,000  BB Holdings Ltd. ...................       42,460         60,930
       3,600  Carlisle Group Ltd.+ ...............        5,790          6,999
      25,693  Contax Participacoes SA, ADR .......       11,050         30,914
       4,000  Convergys Corp.+ ...................       53,716         63,400
       6,000  Donnelley (R.H.) Corp.+ ............       80,412        369,720
      59,500  Group 4 Securicor plc ..............            0        164,814
      15,000  TNT NV, ADR ........................      198,278        469,200
                                                   ------------   ------------
                                                      1,666,706      2,947,227
                                                   ------------   ------------
              CABLE -- 9.3%
      80,000  Adelphia Communications
                Corp., Cl. A+ ....................       74,756          3,200
      19,065  Austar United
                Communications Ltd.+ .............       41,202         16,562
      80,000  Cablevision Systems Corp.,
                Cl. A+ ...........................    1,808,961      1,877,600
      20,000  Charter Communications Inc.,
                Cl. A+ ...........................       58,692         24,400
       6,000  Comcast Corp., Cl. A+ ..............      185,040        155,760
      22,000  Comcast Corp., Cl. A, Special+ .....      175,463        565,180
      60,732  Liberty Global Inc., Cl. A+ ........    1,330,262      1,366,470
      59,000  Liberty Global Inc., Cl. C+ ........    1,268,497      1,250,800
      18,000  Mediacom Communications Corp.,
                Cl. A+ ...........................      165,595         98,820
     284,765  Rogers Communications Inc.,
                Cl. B, New York ..................    2,946,497     12,034,169
         235  Rogers Communications Inc.,
                Cl. B, Toronto ...................       11,540          9,946
                                                   ------------   ------------
                                                      8,066,505     17,402,907
                                                   ------------   ------------

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              COMMUNICATIONS EQUIPMENT -- 3.2%
      10,000  Agere Systems Inc.+ ................ $    166,400   $    129,000
       3,000  Andrew Corp.+ ......................        8,535         32,190
         500  Avaya Inc.+ ........................        4,138          5,335
     100,000  Champion Technology Holdings Ltd. ..       87,982         15,477
      25,000  Communications Systems Inc. ........      237,711        307,000
       3,200  Ericsson (L.M.) Telephone Co.,
                Cl. B, ADR .......................       40,907        110,080
      75,000  Furukawa Electric Co. Ltd.+ ........      381,079        586,340
     100,000  GN Store Nord A/S ..................      541,433      1,309,108
      10,000  JDS Uniphase Corp.+ ................       45,488         23,600
       1,000  L-3 Communications Holdings Inc. ...       11,000         74,350
     100,000  Lucent Technologies Inc.+ ..........      390,922        266,000
      67,000  Motorola Inc. ......................      549,845      1,513,530
      28,000  Nokia Corp., ADR ...................       67,091        512,400
      45,000  Nortel Networks Corp.+ .............      196,650        137,700
      22,000  Scientific-Atlanta Inc. ............      179,954        947,540
         750  Siemens AG, ADR ....................       23,625         64,192
     300,000  Time Engineering Berhad+ ...........      316,448         21,828
         816  Tut Systems Inc.+ ..................       13,135          2,440
                                                   ------------   ------------
                                                      3,262,343      6,058,110
                                                   ------------   ------------
              COMPUTER SOFTWARE AND SERVICES -- 0.9%
       2,000  America Online Latin America Inc.,
                Cl. A+ ...........................          840             50
       6,000  Covad Communications Group Inc.+ ...       11,761          5,880
       3,230  EarthLink Inc.+ ....................       45,250         35,885
       1,000  Geoworks Corp.+ ....................        1,375             32
          10  Korea Thrunet Co. Ltd. (c) .........        5,250              1
      18,000  Net2Phone Inc.+ ....................       55,561         36,720
      20,000  NorthPoint Communications
                Group Inc.+ ......................       11,250             12
       5,852  Telecom Italia Media SpA+ ..........        4,669          3,097
       1,000  Via Net.Works Inc.+ ................        2,625             32
      40,000  Yahoo! Inc.+ .......................    1,356,975      1,567,200
                                                   ------------   ------------
                                                      1,495,556      1,648,909
                                                   ------------   ------------
              DIVERSIFIED INDUSTRIAL -- 2.0%
      65,000  Bouygues SA ........................    1,809,898      3,178,164
      50,000  Hutchison Whampoa Ltd. .............      487,171        476,228
                                                   ------------   ------------
                                                      2,297,069      3,654,392
                                                   ------------   ------------
              ELECTRONICS -- 0.2%
      32,000  California Micro Devices Corp.+ ....      203,882        208,320
       8,000  Freescale Semiconductor Inc.,
                Cl. B+ ...........................       68,379        201,360
       2,000  TiVo Inc.+ .........................       11,105         10,240
       1,000  Vishay Intertechnology Inc.+ .......       22,909         13,760
                                                   ------------   ------------
                                                        306,275        433,680
                                                   ------------   ------------

                See accompanying notes to financial statements.

                                       5


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              COMMON STOCKS (CONTINUED)
              ENERGY AND UTILITIES -- 0.5%
       3,000  E.ON AG ............................ $    126,255   $    310,382
      11,000  SCANA Corp. ........................      290,109        433,180
       2,500  SJW Corp. ..........................       78,585        113,750
                                                   ------------   ------------
                                                        494,949        857,312
                                                   ------------   ------------
              ENTERTAINMENT -- 6.0%
      40,000  Discovery Holding Co., Cl. A+ ......      222,452        606,000
     440,000  Gemstar-TV Guide
                International Inc.+ ..............    2,121,732      1,148,400
     375,000  Liberty Media Corp., Cl. A+ ........    1,308,068      2,951,250
      15,000  Metromedia International
                Group Inc.+ ......................       59,576         22,650
     195,000  Time Warner Inc. ...................    3,365,101      3,400,800
     100,000  Vivendi Universal SA, ADR ..........    2,087,247      3,143,000
                                                   ------------   ------------
                                                      9,164,176     11,272,100
                                                   ------------   ------------
              EQUIPMENT AND SUPPLIES -- 0.2%
       1,000  Amphenol Corp., Cl. A ..............        8,184         44,260
      15,000  ThyssenKrupp AG ....................      275,840        312,903
                                                   ------------   ------------
                                                        284,024        357,163
                                                   ------------   ------------
              PUBLISHING -- 0.6%
         600  Media General Inc., Cl. A ..........       34,079         30,420
      35,000  News Corp., Cl. A ..................      519,579        544,250
       2,000  News Corp., Cl. B ..................       21,050         33,220
      15,428  Seat Pagine Gialle SpA+ ............       30,783          7,205
      25,000  Telegraaf Media Groep NV ...........      541,844        540,152
                                                   ------------   ------------
                                                      1,147,335      1,155,247
                                                   ------------   ------------
              SATELLITE -- 2.7%
       1,500  Asia Satellite Telecommunications
                Holdings Ltd., ADR ...............       22,103         25,425
       1,500  British Sky Broadcasting
                Group plc, ADR ...................       36,400         52,020
     137,000  DIRECTV Group Inc.+ ................    2,767,667      1,934,440
     100,000  EchoStar Communications
                Corp., Cl. A+ ....................    1,863,471      2,717,000
       1,000  Lockheed Martin Corp. ..............       22,787         63,630
       2,524  Orbital Sciences Corp.+ ............       16,208         32,408
       5,000  Pegasus Communications Corp.,
                Cl. A+ ...........................       33,138         19,750
       8,000  PT Indosat Tbk, ADR ................       78,653        232,720
                                                   ------------   ------------
                                                      4,840,427      5,077,393
                                                   ------------   ------------
              TELECOMMUNICATIONS: BROADBAND -- 0.3%
       6,720  Colt Telecom Group plc, ADR+ .......       39,630         25,133
      10,000  E.Spire Communications Inc.+ .......       50,000              5

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
      18,000  Golden Telecom Inc. ................ $    188,378   $    467,280
      22,422  McLeodUSA Inc., Cl. A+ .............       78,431            247
       6,000  Time Warner Telecom Inc., Cl. A+ ...        4,800         59,100
                                                   ------------   ------------
                                                        361,239        551,765
                                                   ------------   ------------
              TELECOMMUNICATIONS: LONG DISTANCE -- 5.7%
      90,000  AT&T Inc. ..........................    3,229,896      2,204,100
     320,000  Cable & Wireless plc ...............      608,019        656,538
       5,200  Embratel Participacoes SA, ADR+ ....      505,937         76,700
      80,000  General Communication Inc.,
                Cl. A+ ...........................      376,995        826,400
      37,000  IDT Corp.+ .........................      328,471        427,720
      35,000  IDT Corp., Cl. B+ ..................      248,267        409,500
         600  KDDI Corp. .........................    3,016,474      3,459,533
       5,000  MCI Inc. ...........................      128,650         98,650
      75,416  Philippine Long Distance
                Telephone Co., ADR ...............    1,482,822      2,529,456
                                                   ------------   ------------
                                                      9,925,531     10,688,597
                                                   ------------   ------------
              TELECOMMUNICATIONS: NATIONAL -- 24.4%
      44,214  Brasil Telecom SA, Pfd. ............          474            190
      42,000  BT Group plc, ADR ..................    1,633,962      1,611,960
  17,415,054  Cable & Wireless Jamaica Ltd.+ .....      406,745        399,818
      75,000  China Unicom Ltd., ADR .............      628,818        613,500
     145,000  Compania de Telecomunicaciones
                de Chile SA, ADR .................    2,027,580      1,276,000
     285,000  Deutsche Telekom AG, ADR ...........    3,105,835      4,739,550
     180,000  Elisa Oyj, Cl. A ...................    2,286,461      3,335,030
      40,000  France Telecom SA, ADR .............    1,091,954        993,600
       5,507  Hellenic Telecommunications
                Organization SA+ .................       86,065        117,355
      36,000  Hellenic Telecommunications
                Organization SA, ADR+ ............      218,769        377,280
      18,000  Hungarian Telephone &
                Cable Corp.+ .....................      139,278        279,900
      57,000  KPN NV, ADR ........................      472,195        572,280
      10,000  KT Corp., ADR ......................      183,666        215,500
         500  Magyar Telekom, ADR ................        9,650         11,015
       5,000  Manitoba Telecom Services Inc. .....      168,270        173,771
       2,000  Maroc Telecom ......................       18,299         21,263
         237  Nippon Telegraph &
                Telephone Corp. ..................    1,207,105      1,077,136
      22,000  Nippon Telegraph &
                Telephone Corp., ADR .............      622,716        501,820
       2,000  Pakistan Telecommunications
                Co. Ltd., GDR (a) ................      155,766        218,766
     100,000  PCCW Ltd. ..........................       81,405         61,584

                See accompanying notes to financial statements.

                                       6


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              COMMON STOCKS (CONTINUED)
              TELECOMMUNICATIONS: NATIONAL (CONTINUED)
      68,000  Portugal Telecom SGPS SA, ADR ...... $    277,645   $    684,760
      18,360  PT Telekomunikasi Indonesia, ADR ...      165,504        438,070
      10,000  Rostelecom, ADR ....................       79,578        136,500
     928,580  Singapore
                Telecommunications Ltd. ..........      806,749      1,457,669
     102,000  Swisscom AG, ADR ...................    2,681,536      3,214,020
      60,000  TDC A/S, ADR .......................    1,061,291      1,792,800
      25,000  Telecom Corp. of New
                Zealand Ltd., ADR ................      515,375        817,000
   2,210,000  Telecom Italia SpA .................    4,212,814      6,436,360
      27,000  Telecom Italia SpA, ADR ............      621,934        788,670
      57,700  Telefonica de Argentina SA, ADR+ ...      376,367        595,464
     100,000  Telefonica SA, ADR .................    2,634,654      4,502,000
       6,361  Telefonica SA, BDR .................      108,406         96,572
     100,000  Telefonos de Mexico SA de CV,
                Cl. L, ADR .......................      719,898      2,468,000
      46,604  Telekom Austria AG .................      347,582      1,048,310
     339,000  Telekom Malaysia Berhad ............    1,520,064        856,581
       3,355  Telemar Norte Leste SA .............      148,531         91,110
     666,336  TeliaSonera AB .....................    2,961,330      3,581,414
       2,400  Telstra Corp. Ltd., ADR ............       47,304         34,392
       8,075  Thai Telephone &
                Telecom, GDR+ (a)(b) .............      100,542          1,696
                                                   ------------   ------------
                                                     33,932,117     45,638,706
                                                   ------------   ------------
              TELECOMMUNICATIONS: REGIONAL -- 16.9%
      78,000  Aliant Inc. ........................    1,345,457      2,073,379
      13,300  Atlantic Tele-Network Inc. .........      112,178        557,270
     148,000  BCE Inc. ...........................    3,411,732      3,544,600
      65,000  BellSouth Corp. ....................    1,899,994      1,761,500
      12,000  Brasil Telecom
                Participacoes SA, ADR ............      595,898        448,200
         952  Brasil Telecom SA ..................            3              7
      40,000  CenturyTel Inc. ....................    1,103,188      1,326,400
     255,000  Cincinnati Bell Inc.+ ..............    1,853,126        895,050
     120,000  Citizens Communications Co. ........    1,223,332      1,467,600
      49,000  Commonwealth Telephone
                Enterprises Inc. .................    1,479,530      1,654,730
      50,060  D&E Communications Inc. ............      624,913        417,000
     170,000  First Pacific Co. Ltd. .............       92,079         65,775
      20,000  First Pacific Co. Ltd., ADR ........       30,144         38,692
     450,000  Qwest Communications
                International Inc.+ ..............    1,840,303      2,542,500
      11,000  Shenandoah Telecommunications Co. ..      138,825        438,240
      25,693  Tele Norte Leste Participacoes
                SA, ADR ..........................      357,296        460,419

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
     215,000  Telecom Argentina SA, Cl. B, ADR+ .. $  1,013,186   $  2,771,350
      70,000  Telephone & Data Systems Inc. ......    1,520,586      2,522,100
      65,000  Telephone & Data Systems Inc.,
                Special ..........................    1,306,850      2,249,650
      13,421  TELUS Corp. ........................      274,410        552,565
      36,579  TELUS Corp., ADR ...................      654,075      1,498,670
      50,000  TELUS Corp., Non-Voting ............    1,252,423      2,007,398
   1,000,000  True Corp. plc+ ....................      687,194        243,754
      70,000  Verizon Communications Inc. ........    2,749,746      2,108,400
                                                   ------------   ------------
                                                     25,566,468     31,645,249
                                                   ------------   ------------
              WIRELESS COMMUNICATIONS -- 25.3%
      38,000  ABC Communications Holdings Ltd. ...       19,234          3,039
      42,500  ALLTEL Corp. .......................    1,749,052      2,681,750
     245,000  America Movil SA de CV,
                Cl. L, ADR .......................    1,196,828      7,168,700
           5  Celular CRT Participacoes
                SA, Pfd. .........................          205            128
      35,000  Centennial Communications Corp.+ ...      315,665        543,200
      80,000  China Mobile (Hong Kong)
                Ltd., ADR ........................    1,165,904      1,923,200
      70,000  CP Pokphand Co. Ltd., ADR+ .........       58,725         95,921
      40,000  Dobson Communications
                Corp., Cl. A+ ....................      129,100        300,000
      10,000  EasyCall International Ltd.+ .......        9,532            469
     240,000  Europolitan Vodafone AB+ (c) .......      220,305      1,419,850
      17,500  Grupo Iusacell SA de CV+ ...........       29,040         42,637
      26,000  Himachal Futuristic
                Communications Ltd.+ (a)(c) ......      141,200         49,660
         666  Hutchison Telecommunications
                International Ltd.+ ..............          519            962
       2,000  Millicom International
                Cellular SA+ .....................       17,000         53,680
         800  Mobile TeleSystems, ADR ............       29,612         28,000
      65,000  Nextel Partners Inc., Cl. A+ .......      666,568      1,816,100
       1,500  NTT DoCoMo Inc. ....................    4,313,046      2,289,397
   1,550,000  O2 plc .............................    1,627,628      5,273,514
      92,000  Price Communications Corp.+ ........    1,354,830      1,368,040
      42,000  Rural Cellular Corp., Cl. A+ .......      432,519        613,620
      90,000  SK Telecom Co. Ltd., ADR ...........    1,068,189      1,826,100
     460,000  Sprint Nextel Corp. ................    6,805,241     10,745,600
       6,000  SunCom Wireless
                Holdings Inc., Cl. A+ ............       20,520         16,620
       3,413  Tele Centro Oeste Celular
                Participacoes SA, ADR ............        9,894         38,294
         264  Tele Leste Celular
                Participacoes SA, ADR+ ...........        6,975          3,736

                See accompanying notes to financial statements.

                                       7


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              COMMON STOCKS (CONTINUED)
              WIRELESS COMMUNICATIONS (CONTINUED)
         460  Tele Norte Celular
                Participacoes SA, ADR+ ........... $      7,079   $      3,427
       3,918  Tele Sudeste Celular
                Participacoes SA, Pfd. ...........      118,808         46,916
       1,150  Telemig Celular
                Participacoes SA, ADR ............       30,497         45,322
       3,020  Telesp Celular Participacoes SA+ ...        6,747         10,965
      12,425  Telesp Celular
                Participacoes SA, ADR ............      299,286         46,966
         107  Telesp Celular Participacoes
                SA, Pfd.+ ........................       40,643            405
       4,430  Tim Participacoes SA, ADR ..........       54,016        111,990
     110,000  United States Cellular Corp.+ ......    4,971,685      5,434,000
      59,000  Vimpel-Communications, ADR+ ........      447,656      2,609,570
      33,000  Vodafone Group plc, ADR ............      669,669        708,510
                                                   ------------   ------------
                                                     28,033,417     47,320,288
                                                   ------------   ------------
              TOTAL COMMON STOCKS ................  132,259,088    187,730,014
                                                   ------------   ------------
              RIGHTS -- 0.0%
              TELECOMMUNICATIONS -- 0.0%
     315,789  True Corp. plc Rights+(c) ..........            0         15,272
                                                   ------------   ------------

                                                                     MARKET
      SHARES                                             COST         VALUE
      ------                                             ----        ------
              WARRANTS -- 0.0%
              COMMUNICATIONS EQUIPMENT -- 0.0%
      19,375  Champion Technology Holdings Ltd.,
                expire 02/16/06+ (c) ............. $          0   $         45
      20,000  Champion Technology Holdings Ltd.,
                expire 02/27/07+ (c) .............            0              0
       1,473  Lucent Technologies Inc.,
                expire 12/10/07+ .................        2,445            832
                                                   ------------   ------------
              TOTAL WARRANTS .....................        2,445            877
                                                   ------------   ------------
              TOTAL INVESTMENTS -- 100.3% ........ $132,261,533    187,746,163
                                                   ============
              OTHER ASSETS AND
                LIABILITIES (NET) -- (0.3)% ....................      (521,410)
                                                                  ------------
              NET ASSETS -- 100.0% .............................  $187,224,753
                                                                  ============
- ----------------
 (a) Security exempt from registration  under Rule 144A of the Securities Act of
     1933, as amended.  These  securities may be resold in  transactions  exempt
     from registration,  normally to qualified institutional buyers. At December
     31, 2005, the market value of Rule 144A  securities  amounted to $2,051,372
     or 1.10% of total net assets.  Except as noted in (b), these securities are
     liquid.
 (b) At December  31, 2005,  the Fund held an  investment  in a  restricted  and
     illiquid  security  amounting  to $1,696 or 0.00% of net assets,  which was
     valued under methods approved by the Board, as follows:

                                                                        12/31/05
                                                                        CARRYING
ACQUISITION                                    ACQUISITION ACQUISITION   VALUE
  SHARES   ISSUER                                 DATE        COST      PER UNIT
  ------   ------                              ----------- -----------  --------
   8,075   Thai Telephone & Telecom, GDR .....  03/31/94    $100,542     $0.2100

 (c) Security  fair  valued  under  procedures   established  by  the  Board  of
     Directors.   The  procedures  may  include  reviewing  available  financial
     information  about  the  company  and  reviewing  valuation  of  comparable
     securities and other factors on a regular basis.  At December 31, 2005, the
     market value of fair valued  securities  amounted to $1,484,828 or 0.79% of
     total net assets.
 +   Non-income producing security.
 ADR American Depository Receipt
 BDR Brazilian Depository Receipt
 GDR Global Depository Receipt

                                        % OF
                                       MARKET      MARKET
GEOGRAPHIC DIVERSIFICATION              VALUE      VALUE
- --------------------------            --------    --------
North America ........................  50.2%  $ 94,184,835
Europe ...............................  30.5     57,214,102
Latin America ........................   8.6     16,250,018
Asia/Pacific .........................   6.5     12,182,983
Japan ................................   4.2      7,914,225
                                       ------  ------------
                                       100.0%  $187,746,163
                                       ======  ============


                 See accompanying notes to financial statements.

                                       8


                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND


STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2005
================================================================================

ASSETS:
  Investments at value (cost $132,261,533) ...................  $ 187,746,163
  Dividends and interest receivable ..........................        512,317
  Receivable for investments sold ............................        210,244
  Receivable for Fund shares sold ............................        103,036
  Other assets ...............................................          7,365
                                                                -------------
  TOTAL ASSETS ...............................................    188,579,125
                                                                -------------
LIABILITIES:
  Payable to custodian .......................................        776,038
  Payable for Fund shares redeemed ...........................        214,246
  Payable for investment advisory fees .......................        160,791
  Payable for shareholder communications expenses ............         62,185
  Payable for shareholder services fees ......................         57,314
  Payable for distribution fees ..............................         40,619
  Other accrued expenses .....................................         43,179
                                                                -------------
  TOTAL LIABILITIES ..........................................      1,354,372
                                                                -------------
  NET ASSETS applicable to 10,684,132 shares outstanding .....  $ 187,224,753
                                                                =============
NET ASSETS CONSIST OF:
  Capital stock, each class at $0.001 par value ..............  $      10,684
  Additional paid-in capital .................................    193,252,725
  Accumulated distributions in excess of net investment income       (240,918)
  Accumulated net realized loss on investments
   and foreign currency transactions .........................    (61,281,481)
  Net unrealized appreciation on investments .................     55,484,630
  Net unrealized depreciation on foreign currency translations           (887)
                                                                -------------
  NET ASSETS .................................................  $ 187,224,753
                                                                =============
SHARES OF CAPITAL STOCK:
  CLASS AAA:
  Net Asset Value, offering and redemption price per share
    ($185,870,434 / 10,605,897 shares outstanding;
    75,000,000 shares authorized) ............................         $17.53
                                                                       ======
  CLASS A:
  Net Asset Value and redemption price per share
    ($735,215 / 41,995 shares outstanding;
    50,000,000 shares authorized) ............................         $17.51
                                                                       ======
  Maximum offering price per share (NAV / 0.9425,
    based on maximum sales charge
    of 5.75% of the offering price) ..........................         $18.58
                                                                       ======
  CLASS B:
  Net Asset Value and offering price per share
    ($424,617 / 24,821 shares outstanding;
    25,000,000 shares authorized) ............................         $17.11(a)
                                                                       ======
  CLASS C:
  Net Asset Value and offering price per share
    ($194,487 / 11,419 shares outstanding;
    25,000,000 shares authorized) ............................         $17.03(a)
                                                                       ======

- ---------------
(a) Redemption price varies based on length of time held.



STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2005
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $410,517) .....   $ 4,876,260
  Interest .........................................        33,781
                                                       -----------
  TOTAL INVESTMENT INCOME ..........................     4,910,041
                                                       -----------
EXPENSES:
  Investment advisory fees .........................     1,960,781
  Distribution fees - Class AAA ....................       486,304
  Distribution fees - Class A ......................         1,693
  Distribution fees - Class B ......................         6,108
  Distribution fees - Class C ......................         2,684
  Shareholder services fees ........................       258,550
  Shareholder communications expenses ..............       148,207
  Custodian fees ...................................        64,468
  Legal and audit fees .............................        51,813
  Registration fees ................................        33,975
  Directors' fees ..................................        20,658
  Interest expense .................................         5,118
  Miscellaneous expenses ...........................        78,654
                                                       -----------
  TOTAL EXPENSES ...................................     3,119,013
  Less: Custodian fee credits ......................          (338)
                                                       -----------
  NET EXPENSES .....................................     3,118,675
                                                       -----------
  NET INVESTMENT INCOME ............................     1,791,366
                                                       -----------
NET REALIZED AND UNREALIZED GAIN (LOSS)
  ON INVESTMENTS AND FOREIGN CURRENCY:
  Net realized gain on investments .................     5,150,759
  Net realized loss on foreign currency transactions       (20,876)
  Net change in unrealized appreciation/depreciation
   on investments and foreign currency translations     (2,147,155)
                                                       -----------
  NET REALIZED AND UNREALIZED GAIN (LOSS)
    ON INVESTMENTS AND FOREIGN CURRENCY ............     2,982,728
                                                       -----------
  NET INCREASE IN NET ASSETS
   RESULTING FROM OPERATIONS .......................   $ 4,774,094
                                                       ===========

                 See accompanying notes to financial statements.

                                       9


                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND

STATEMENT OF CHANGES IN NET ASSETS
================================================================================


                                                                                   YEAR ENDED             YEAR ENDED
                                                                                DECEMBER 31, 2005      DECEMBER 31, 2004
                                                                                -----------------      -----------------
                                                                                                 
OPERATIONS:
  Net investment income ...................................................       $   1,791,366        $     941,134
  Net realized gain (loss) on investments and foreign currency transactions           5,129,883           (1,842,073)

  Net change in unrealized appreciation/depreciation on investments
    and foreign currency translations .....................................          (2,147,155)          40,701,406
                                                                                  -------------        -------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS ....................           4,774,094           39,800,467
                                                                                  -------------        -------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income
    Class AAA .............................................................          (2,003,135)            (962,965)
    Class A ...............................................................              (8,156)              (2,741)
    Class B ...............................................................                  --                   --
    Class C ...............................................................                (117)                (743)
                                                                                  -------------        -------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS .....................................          (2,011,408)            (966,449)
                                                                                  -------------        -------------
CAPITAL SHARE TRANSACTIONS:
    Class AAA .............................................................         (25,916,855)         (15,265,831)
    Class A ...............................................................             124,167               86,356
    Class B ...............................................................            (435,480)            (125,404)
    Class C ...............................................................             (62,137)             132,412
                                                                                  -------------        -------------
  NET DECREASE IN NET ASSETS FROM CAPITAL SHARE TRANSACTIONS ..............         (26,290,305)         (15,172,467)
                                                                                  -------------        -------------
  REDEMPTION FEES .........................................................               7,745               31,714
                                                                                  -------------        -------------
  NET INCREASE (DECREASE) IN NET ASSETS ...................................         (23,519,874)          23,693,265
NET ASSETS:
  Beginning of period .....................................................         210,744,627          187,051,362
                                                                                  -------------        -------------
  End of period (including undistributed net investment
    income of $0 and $0, respectively) ....................................       $ 187,224,753        $ 210,744,627
                                                                                  =============        =============


                 See accompanying notes to financial statements.

                                       10


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS
================================================================================


1.  ORGANIZATION.   The  GAMCO  Global  Telecommunications  Fund  (the  "Fund"),
formerly, The Gabelli Global  Telecommunications  Fund, a series of GAMCO Global
Series Funds, Inc. (the "Corporation"),  formerly,  Gabelli Global Series Funds,
Inc.,  was organized on July 16, 1993 as a Maryland  corporation.  The Fund is a
non-diversified  open-end  management  investment  company  registered under the
Investment  Company Act of 1940,  as amended (the "1940  Act"),  and one of four
separately   managed   portfolios   (collectively,   the  "Portfolios")  of  the
Corporation.  The Fund's  primary  objective is capital  appreciation.  The Fund
commenced investment operations on November 1, 1993.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance  with  U.S.  generally  accepted   accounting   principles   requires
management to make estimates and  assumptions  that affect the reported  amounts
and  disclosures in the financial  statements.  Actual results could differ from
those estimates.  The following is a summary of significant  accounting policies
followed by the Fund in the preparation of its financial statements.

SECURITY  VALUATION.  Portfolio  securities  listed or  traded  on a  nationally
recognized securities exchange or traded in the U.S. over-the-counter market for
which market quotations are readily available are valued at the last quoted sale
price or a market's  official  closing  price as of the close of business on the
day the  securities  are being  valued.  If there  were no sales  that day,  the
security is valued at the  average of the  closing  bid and asked  prices or, if
there were no asked  prices  quoted on that day,  then the security is valued at
the closing bid price on that day. If no bid or asked  prices are quoted on such
day,  the  security is valued at the most  recently  available  price or, if the
Board of  Directors  (the  "Board") so  determines,  by such other method as the
Board shall determine in good faith, to reflect its fair market value. Portfolio
securities  traded on more than one national  securities  exchange or market are
valued according to the broadest and most  representative  market, as determined
by Gabelli Funds, LLC (the "Adviser").

Portfolio securities primarily traded on foreign markets are generally valued at
the preceding closing values of such securities on their respective exchanges or
if after the close of the foreign markets, but prior to the close of business on
the day the securities are being valued, market conditions change significantly,
certain foreign securities may be fair valued pursuant to procedures established
by the Board. Debt instruments with remaining maturities of 60 days or less that
are not  credit  impaired  are  valued  at  amortized  cost,  unless  the  Board
determines  such amount does not reflect the  securities'  fair value,  in which
case these  securities  will be valued at their fair value as  determined by the
Board. Debt instruments  having a maturity greater than 60 days for which market
quotations are readily available are valued at the average of the latest bid and
asked prices.  If there were no asked prices quoted on such day, the security is
valued using the closing bid price.  Futures contracts are valued at the closing
settlement  price of the  exchange  or board  of trade on which  the  applicable
contract is traded.

Securities and assets for which market  quotations are not readily available are
valued  at their  fair  value  as  determined  in good  faith  under  procedures
established by and under the general  supervision  of the Board.  Fair valuation
methodologies  and procedures may include,  but are not limited to: analysis and
review of available  financial and non-financial  information about the company;
comparisons  to the  valuation  and changes in valuation of similar  securities,
including a comparison of foreign securities to the equivalent U.S. dollar value
ADR  securities at the close of the U.S.  exchange;  and evaluation of any other
information that could be indicative of the value of the security.

                                       11


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit  guidelines  established  by the  Adviser  and  reviewed by the
Board.  Under  the  terms of a  typical  repurchase  agreement,  the Fund  takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2005, there were no open repurchase agreements.

FUTURES  CONTRACTS.  The Fund may engage in futures contracts for the purpose of
hedging  against  changes in the value of its  portfolio  securities  and in the
value of  securities  it  intends  to  purchase.  Upon  entering  into a futures
contract,  the Fund is required to deposit  with the broker an amount of cash or
cash equivalents equal to a certain  percentage of the contract amount.  This is
known as the "initial margin". Subsequent payments ("variation margin") are made
or  received by the Fund each day,  depending  on the daily  fluctuation  of the
value of the  contract.  The daily  changes  in the  contract  are  included  in
unrealized gains or losses. The Fund recognizes a realized gain or loss when the
contract is closed.

There are several  risks in  connection  with the use of futures  contracts as a
hedging  instrument.   The  change  in  value  of  futures  contracts  primarily
corresponds  with the  value  of their  underlying  instruments,  which  may not
correlate with the change in value of the hedged investments. In addition, there
is the risk that the Fund may not be able to enter  into a  closing  transaction
because of an illiquid  secondary  market.  At December 31, 2005,  there were no
open futures contracts.

SECURITIES  SOLD SHORT. A short sale involves  selling a security which the Fund
does not own. The proceeds  received for short sales are recorded as liabilities
and the Fund records an unrealized  gain or loss to the extent of the difference
between the proceeds  received  and the value of the open short  position on the
day of  determination.  The Fund records a realized  gain or loss when the short
position is closed out. By entering into a short sale, the Fund bears the market
risk of an unfavorable change in the price of the security sold short. Dividends
on short sales are  recorded as an expense by the Fund on the  ex-dividend  date
and interest expense is recorded on the accrual basis. The Fund did not hold any
short positions as of December 31, 2005.

FORWARD  FOREIGN  EXCHANGE  CONTRACTS.  The Fund may engage in  forward  foreign
exchange contracts for hedging a specific transaction with respect to either the
currency in which the  transaction is denominated or another  currency as deemed
appropriate by the Adviser. Forward foreign exchange contracts are valued at the
forward  rate and are  marked-to-market  daily.  The  change in market  value is
included in  unrealized  appreciation/depreciation  on  investments  and foreign
currency translations.  When the contract is closed, the Fund records a realized
gain or loss equal to the  difference  between the value of the  contract at the
time it was  opened  and the  value at the  time it was  closed.

                                       12


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

The use of forward foreign exchange contracts does not eliminate fluctuations in
the underlying prices of the Fund's portfolio securities,  but it does establish
a rate of exchange that can be achieved in the future.  Although forward foreign
exchange  contracts  limit the risk of loss due to a decline in the value of the
hedged currency, they also limit any potential gain that might result should the
value of the currency increase. In addition,  the Fund could be exposed to risks
if the  counterparties  to the  contracts  are unable to meet the terms of their
contracts.  At December 31, 2005,  there were no open forward  foreign  exchange
contracts.

FOREIGN CURRENCY TRANSLATIONS.  The books and records of the Fund are maintained
in United States (U.S.)  dollars.  Foreign  currencies,  investments,  and other
assets and liabilities are translated into U.S.  dollars at the current exchange
rates.  Purchases and sales of investment  securities,  income, and expenses are
translated  at the exchange  rate  prevailing  on the  respective  dates of such
transactions.  Unrealized  gains and losses that result from  changes in foreign
exchange rates and/or changes in market prices of securities  have been included
in unrealized  appreciation/depreciation  on  investments  and foreign  currency
translations.  Net realized  foreign  currency  gains and losses  resulting from
changes in exchange  rates include  foreign  currency  gains and losses  between
trade date and settlement date on investment  securities  transactions,  foreign
currency  transactions,  and the difference  between the amounts of interest and
dividends  recorded on the books of the Fund and the amounts actually  received.
The  portion of foreign  currency  gains and losses  related to  fluctuation  in
exchange rates between the initial trade date and subsequent  sale trade date is
included in realized gain/(loss) on investments.

FOREIGN  SECURITIES.  The Fund  may  directly  purchase  securities  of  foreign
issuers.  Investing in securities of foreign issuers  involves special risks not
typically  associated  with investing in securities of U.S.  issuers.  The risks
include  possible  revaluation of currencies,  the ability to repatriate  funds,
less complete financial information about companies, and possible future adverse
political  and  economic  developments.  Moreover,  securities  of many  foreign
issuers and their markets may be less liquid and their prices more volatile than
those of securities of comparable U.S. issuers.

FOREIGN  TAXES.  The Fund may be subject to  foreign  taxes on income,  gains on
investments or currency repatriation, a portion of which may be recoverable. The
Fund will accrue such taxes and recoveries as applicable, based upon its current
interpretation  of tax rules and regulations  that exist in the markets in which
it invests.

RESTRICTED  AND  ILLIQUID  SECURITIES.  The Fund may invest up to 15% of its net
assets in  securities  for which the markets are illiquid.  Illiquid  securities
include  securities the disposition of which is subject to substantial  legal or
contractual  restrictions.  The sale of illiquid  securities often requires more
time and  results  in higher  brokerage  charges or dealer  discounts  and other
selling  expenses  than does the sale of  securities  eligible  for  trading  on
national securities  exchanges or in the  over-the-counter  markets.  Restricted
securities  may  sell at a price  lower  than  similar  securities  that are not
subject to  restrictions  on resale.  Securities  freely salable among qualified
institutional  investors  under  special  rules  adopted by the  Securities  and
Exchange  Commission  (the  "SEC")  may be  treated  as liquid  if they  satisfy
liquidity  standards  established by the Board. The continued  liquidity of such
securities  is not as well assured as that of publicly  traded  securities,  and
accordingly the Board will monitor their liquidity.

                                       13


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

CONCENTRATION  RISK.  The Fund may  invest a high  percentage  of its  assets in
specific  sectors  of the  market  in order to  achieve  a  potentially  greater
investment  return.  As a result,  the Fund may be more susceptible to economic,
political,  and regulatory  developments  in a particular  sector of the market,
positive or negative,  and may experience increased volatility to the Fund's net
asset value ("NAV") and a magnified effect in its total return.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME.  Securities  transactions  are
accounted  for on the  trade  date  with  realized  gain or loss on  investments
determined  by using the  identified  cost method.  Interest  income  (including
amortization  of premium and  accretion  of discount) is recorded on the accrual
basis.  Premiums  and  discounts  on debt  securities  are  amortized  using the
effective  yield  to  maturity  method.  Dividend  income  is  recorded  on  the
ex-dividend date except for certain  dividends which are recorded as soon as the
Fund is informed of the dividend.

DETERMINATION   OF  NET  ASSET  VALUE  AND  CALCULATION  OF  EXPENSES.   Certain
administrative  expenses are common to, and allocated among,  various affiliated
funds.  Such allocations are made on the basis of each Fund's average net assets
or other criteria  directly  affecting the expenses as determined by the Adviser
pursuant to procedures established by the Board.

In  calculating  NAV per share of each class,  investment  income,  realized and
unrealized  gains and losses,  redemption  fees,  and expenses  other than class
specific  expenses,  are allocated  daily to each class of shares based upon the
proportion  of  net  assets  of  each  class  at  the  beginning  of  each  day.
Distribution expenses are borne solely by the class incurring the expense.

CUSTODIAN FEE CREDITS. When cash balances are maintained in the custody account,
the Fund receives  credits which are used to offset  custodian  fees.  The gross
expenses paid under the custody  arrangement  are included in custodian  fees in
the  Statement of  Operations  with the  corresponding  expense  offset shown as
"custodian fee credits".

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders are recorded on the ex-dividend date. Distributions to shareholders
are based on income and capital gains as  determined in accordance  with Federal
income tax  regulations,  which may differ  from  income  and  capital  gains as
determined  under  U.S.  generally   accepted   accounting   principles.   These
differences  are  primarily  due to differing  treatments of income and gains on
various  investment  securities and foreign  currency  transactions  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund. Distributions from net investment income include net realized gains
on  foreign  currency  transactions.   These  book/tax  differences  are  either
temporary or permanent in nature. To the extent these differences are permanent,
adjustments are made to the  appropriate  equity accounts in the period when the
differences arise. These reclassifications have no impact on the NAV of the Fund
and  the  calculation  of net  investment  income  per  share  in the  Financial
Highlights  excludes  these  adjustments.  For the year ended December 31, 2005,
reclassifications  were made to increase accumulated  distributions in excess of
net investment  income by $20,876 and to decrease  accumulated net realized loss
on investments and foreign currency transactions by $20,876.

The tax character of  distributions  paid during the fiscal years ended December
31, 2005 and December 31, 2004 was $2,011,408 and $966,449 of ordinary income.

                                       14


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

PROVISION  FOR  INCOME  TAXES.  The Fund  intends  to  continue  to qualify as a
regulated  investment company under Subchapter M of the Internal Revenue Code of
1986, as amended (the  "Code").  It is the policy of the Fund to comply with the
requirements  of the Code  applicable to regulated  investment  companies and to
distribute  substantially  all of its net investment  company taxable income and
net capital gains. Therefore, no provision for Federal income taxes is required.

As of December 31, 2005, the components of  accumulated  earnings/(losses)  on a
tax basis were as follows:

             Capital loss carryforward ................       $(54,058,602)
             Net unrealized appreciation on securities,
               foreign receivables and payables .......         48,007,197
             Undistributed ordinary income ............             12,749
                                                              ------------
             Total accumulated loss ...................       $ (6,038,656)
                                                              ============

At December 31, 2005,  the Fund has net capital loss  carryforwards  for Federal
income  tax  purposes  of  $54,058,602,  which are  available  to reduce  future
required  distributions of net capital gains to shareholders.  $8,565,109 of the
loss  carryforward is available  through 2009;  $30,268,699 is available through
2010; $11,910,139 is available through 2011; and $3,314,655 is available through
2012.  For the year ended  December 31, 2005, the Fund utilized net capital loss
carryforwards of $4,405,318.

The following  summarizes  the tax cost of  investments  and related  unrealized
appreciation/depreciation at December 31, 2005:

                                         GROSS         GROSS      NET UNREALIZED
                                      UNREALIZED    UNREALIZED     APPRECIATION/
                           COST      APPRECIATION  DEPRECIATION   (DEPRECIATION)
                           ----      ------------  ------------   --------------
   Investments ...... $139,739,386   $67,443,772   $(19,436,995)   $48,006,777

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the  value of its  average  daily net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business and affairs,  and pays the  compensation  of all
Officers and Directors of the Fund who are affiliated persons of the Adviser.

4.  DISTRIBUTION  PLAN.  The Fund's Board has adopted a  distribution  plan (the
"Plan")  for each class of shares  pursuant  to Rule  12b-1  under the 1940 Act.
Gabelli & Company,  Inc.  ("Gabelli &  Company"),  an  affiliate of the Adviser,
serves as  distributor  of the Fund.  Under the Class AAA, Class A, Class B, and
Class C Share  Plans,  payments  are  authorized  to Gabelli & Company at annual
rates of 0.25%, 0.25%, 1.00%, and 1.00%, respectively,  of the average daily net
assets of those classes,  the annual  limitations under each Plan. Such payments
are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2005, other than short-term  securities,  aggregated
$7,197,223 and $27,682,812, respectively.

                                       15


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2005, the
Fund paid brokerage  commissions of $38,223 to Gabelli & Company.  Additionally,
Gabelli & Company  informed  the Fund that it received  $13,514  from  investors
representing  commissions  (sales  charges and  underwriting  fees) on sales and
redemptions of Fund shares.

The cost of calculating  the Fund's NAV per share is a Fund expense  pursuant to
the Advisory  Agreement between the Fund and the Adviser.  During the year ended
December 31, 2005, the Fund  reimbursed the Adviser  $45,000 in connection  with
the cost of  computing  the  Fund's  NAV,  which is  included  in  miscellaneous
expenses in the Statement of Operations.

7. LINE OF CREDIT.  The Fund has access to an unsecured  line of credit of up to
$25,000,000  from the  custodian for temporary  borrowing  purposes.  Borrowings
under this  arrangement  bear  interest at 0.75% above the Federal Funds rate on
outstanding  balances.  At December  31,  2005,  there was a balance of $777,000
outstanding from the line of credit.

The average daily amount of  borrowings  from the line of credit within the year
ended  December 31, 2005 was $143,323 with a weighted  average  interest rate of
3.98%.  The maximum  amount  borrowed at any time during the year ended December
31, 2005 was $4,271,000.

8. CAPITAL STOCK TRANSACTIONS.  The Fund currently offers four classes of shares
- -- Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares. Class
AAA Shares are offered only to investors  who acquire them directly from Gabelli
& Company or through  selected  broker/dealers  without a sales charge.  Class A
Shares are subject to a maximum front-end sales charge of 5.75%.  Class B Shares
are subject to a contingent  deferred  sales  charge  ("CDSC")  upon  redemption
within  six  years  of  purchase  and  automatically  convert  to Class A Shares
approximately  eight years after the original  purchase.  The applicable CDSC is
equal to a declining  percentage  of the lesser of the NAV per share at the date
of the original  purchase or at the date of  redemption,  based on the length of
time held.  Class C Shares are subject to a 1% CDSC for one year after purchase.
Class B Shares are  available  only through  exchange of Class B Shares of other
funds  distributed  by Gabelli & Company.  The Board has approved Class I Shares
which have not been offered publicly.

Effective June 15, 2005, the Fund imposed a redemption fee of 2.00% on Class AAA
Shares,  Class A Shares, Class B Shares, and Class C Shares that are redeemed or
exchanged  on or before the seventh day after the date of a purchase.  (Prior to
June 15, 2005, the Fund imposed a redemption fee on shares that were redeemed or
exchanged  within the sixtieth day after the date of a purchase.) The redemption
fee  is  deducted  from  the  proceeds   otherwise   payable  to  the  redeeming
shareholders  and is retained by the Fund. The  redemption  fees retained by the
Fund during the years ended  December 31, 2005 and December 31, 2004 amounted to
$7,745 and $31,714, respectively.

The redemption fee does not apply to shares purchased  through programs that the
Adviser  determined to have  appropriate  short-term  trading policies in place.
Additionally,  certain recordkeepers for qualified and non-qualified  retirement
plans that could not collect the redemption fee at the participant  level due to
systems limitations have received an extension to implement such systems.

                                       16


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

Transactions in shares of capital stock were as follows:


                                                              YEAR ENDED                       YEAR ENDED
                                                         DECEMBER 31, 2005                  DECEMBER 31, 2004
                                                     ----------------------------      ---------------------------
                                                       SHARES           AMOUNT           SHARES          AMOUNT
                                                     ----------      ------------      ----------     ------------
                                                               CLASS AAA                        CLASS AAA
                                                     ----------------------------      ---------------------------
                                                                                          
Shares sold ........................................    947,426      $ 16,136,166       2,349,410     $ 35,596,632
Shares issued upon reinvestment of dividends .......    108,341         1,901,378          53,559          917,462
Shares redeemed .................................... (2,579,717)      (43,954,399)     (3,507,385)     (51,779,925)
                                                     ----------      ------------      ----------     ------------
    Net decrease ................................... (1,523,950)     $(25,916,855)     (1,104,416)    $(15,265,831)
                                                     ==========      ============      ==========     ============
                                                                CLASS A                          CLASS A
                                                     ----------------------------      ---------------------------
Shares sold ........................................     22,621      $    384,773          24,016     $    370,807
Shares issued upon reinvestment of dividends .......        386             6,767             155            2,655
Shares redeemed ....................................    (15,718)         (267,373)        (19,465)        (287,106)
                                                     ----------      ------------      ----------     ------------
    Net increase ...................................      7,289      $    124,167           4,706     $     86,356
                                                     ==========      ============      ==========     ============
                                                                CLASS B                          CLASS B
                                                     ----------------------------      ---------------------------
Shares sold ........................................         --                --           4,815     $     69,837
Shares redeemed ....................................    (26,153)     $   (435,480)        (13,535)        (195,241)
                                                     ----------      ------------      ----------     ------------
    Net decrease ...................................    (26,153)     $   (435,480)         (8,720)    $   (125,404)
                                                     ==========      ============      ==========     ============
                                                                CLASS C                          CLASS C
                                                     ----------------------------      ---------------------------
Shares sold ........................................      6,357      $    101,796          15,392     $    235,791
Shares issued upon reinvestment of dividends .......          7               118              45              743
Shares redeemed ....................................     (9,842)         (164,051)         (7,412)        (104,122)
                                                     ----------      ------------      ----------     ------------
    Net increase/(decrease) ........................     (3,478)     $    (62,137)          8,025     $    132,412
                                                     ==========      ============      ==========     ============


9.  INDEMNIFICATIONS.  The Fund enters into  contracts that contain a variety of
indemnifications.  The Fund's  maximum  exposure  under  these  arrangements  is
unknown.  However, the Fund has not had prior claims or losses pursuant to these
contracts and expects the risk of loss to be remote.

10. OTHER MATTERS.  The Adviser and/or  affiliates have received  subpoenas from
the Attorney General of the State of New York and the SEC requesting information
on mutual fund trading practices involving certain funds managed by the Adviser.
GAMCO  Investors,  Inc., the Adviser's  parent  company,  is responding to these
requests for documents and testimony.  On a separate matter,  in September 2005,
the Adviser was informed by the staff of the SEC that the staff may recommend to
the Commission that an  administrative  remedy and a monetary  penalty be sought
from the Adviser in connection with the actions of two of seven closed-end funds
managed by the Adviser relating to Section 19(a) and Rule 19a-1 of the 1940 Act.
These  provisions  require  registered  investment  companies to provide written
statements to shareholders  when a dividend is made from a source other than net
investment  income.  While the two closed-end  funds sent annual  statements and
provided other  materials  containing this  information,  the funds did not send
written  statements to shareholders with each distribution in 2002 and 2003. The
Adviser  believes  that all of the  funds  are now in  compliance.  The  Adviser
believes  that these  matters  would have no effect on the Fund or any  material
adverse effect on the Adviser or its ability to manage the Fund.

                                       17


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
FINANCIAL HIGHLIGHTS
================================================================================


Selected data for a share of capital stock outstanding throughout each period:



                            INCOME FROM INVESTMENT OPERATIONS           DISTRIBUTIONS
                          -------------------------------------   --------------------------
                                          Net
              Net Asset       Net     Realized and      Total                    Net
   Period       Value,    Investment   Unrealized       from         Net       Realized
   Ended      Beginning     Income   Gain (Loss) on  Investment   Investment    Gain on       Total
December 31,  of Period    (Loss)(c)   Investments   Operations     Income    Investments  Distributions
- ------------  ---------    --------    -----------   ----------     ------    -----------  -------------
                                                                          
CLASS AAA
  2005         $17.23       $ 0.16      $ 0.33         $ 0.49       $(0.19)         --        $(0.19)
  2004          14.03         0.07        3.21           3.28        (0.08)         --         (0.08)
  2003           9.83        (0.04)       4.24           4.20           --          --            --
  2002          13.96        (0.01)      (4.12)         (4.13)          --          --            --
  2001          17.63        (0.07)      (3.58)         (3.65)          --      $(0.02)        (0.02)
CLASS A
  2005         $17.22       $ 0.14      $ 0.35         $ 0.49       $(0.20)         --        $(0.20)
  2004          14.03         0.08        3.19           3.27        (0.08)         --         (0.08)
  2003           9.83        (0.04)       4.24           4.20           --          --            --
  2002          13.95        (0.00)(a)   (4.12)         (4.12)          --          --            --
  2001          17.61        (0.06)      (3.58)         (3.64)          --      $(0.02)        (0.02)
CLASS B
  2005         $16.77       $ 0.01      $ 0.33         $ 0.34           --          --            --
  2004          13.69        (0.04)       3.12           3.08           --          --            --
  2003           9.67        (0.13)       4.15           4.02           --          --            --
  2002          13.83        (0.08)      (4.08)         (4.16)          --          --            --
  2001          17.59        (0.17)      (3.57)         (3.74)          --      $(0.02)       $(0.02)
CLASS C
  2005         $16.71       $ 0.04      $ 0.29         $ 0.33       $(0.01)         --        $(0.01)
  2004          13.68        (0.06)       3.14           3.08        (0.05)         --         (0.05)
  2003           9.66        (0.16)       4.18           4.02           --          --            --
  2002          13.82        (0.08)      (4.08)         (4.16)          --          --            --
  2001          17.58        (0.17)      (3.57)         (3.74)          --      $(0.02)        (0.02)



                                RATIOS TO AVERAGE NET ASSETS/SUPPLEMENTAL DATA
                         ----------------------------------------------------------

                          Net Asset            Net Assets    Net
   Period                   Value,               End of   Investment                 Portfolio
   Ended       Redemption   End of    Total      Period     Income     Operating     Turnover
December 31,     Fees(c)    Period   Return+   (in 000's)   (Loss)    Expenses(b)     Rate
- ------------     -------    -------  -------   ----------   ------    -------------  --------
                                                        
CLASS AAA
  2005          $0.00(a)    $17.53     2.8%     $185,870     0.92%        1.59%          4%
  2004           0.00(a)     17.23    23.4       209,043     0.49         1.62          15
  2003           0.00(a)     14.03    42.7       185,719    (0.38)        1.62          11
  2002             --         9.83   (29.6)      139,455    (0.05)        1.66           8
  2001             --        13.96   (20.7)      233,887    (0.45)        1.52          15
CLASS A
  2005          $0.00(a)    $17.51     2.8%     $    735     0.83%        1.59%          4%
  2004           0.00(a)     17.22    23.3           598     0.52         1.62          15
  2003           0.00(a)     14.03    42.7           421    (0.38)        1.62          11
  2002             --         9.83   (29.5)          372    (0.05)        1.66           8
  2001             --        13.95   (20.7)          219    (0.45)        1.52          15
CLASS B
  2005          $0.00(a)    $17.11     2.0%     $    425     0.09%        2.33%          4%
  2004           0.00(a)     16.77    22.5           855    (0.25)        2.37          15
  2003           0.00(a)     13.69    41.6           817    (1.13)        2.37          11
  2002             --         9.67   (30.1)          610    (0.80)        2.41           8
  2001             --        13.83   (21.3)          640    (1.20)        2.27          15
CLASS C
  2005          $0.00(a)    $17.03     2.0%     $    195     0.26%        2.34%          4%
  2004           0.00(a)     16.71    22.5           249    (0.44)        2.37          15
  2003           0.00(a)     13.68    41.6            94    (1.13)        2.37          11
  2002             --         9.66   (30.1)          252    (0.80)        2.41           8
  2001             --        13.82   (21.3)          196    (1.20)        2.27          15

- ---------------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including  reinvestment of dividends and does not reflect  applicable  sales
    charges.
(a) Amount represents less than $0.005 per share.
(b) The Fund incurred interest expense during the years ended December 31, 2005,
    2004, 2003, and 2002. If interest  expense had not been incurred,  the ratio
    of operating  expenses to average net assets  would have been 1.58%,  1.61%,
    1.61%,  and 1.64% (Class AAA),  1.59%,  1.61%,  1.61%,  and 1.64% (Class A),
    2.33%, 2.36%, 2.36%, and 2.39% (Class B), and 2.34%, 2.36%, 2.36%, and 2.39%
    (Class C), respectively.
(c) Per share amounts have been calculated using the average shares  outstanding
    method.

                 See accompanying notes to financial statements.

                                       18


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Directors of
GAMCO Global Series Funds, Inc.

We have audited the accompanying statement of assets and liabilities,  including
the schedule of investments,  of The GAMCO Global  Telecommunications  Fund (the
"Fund") (formerly The Gabelli Global Telecommunications Fund), a series of GAMCO
Global Series Funds,  Inc.,  (formerly Gabelli Global Series Funds,  Inc.) as of
December 31, 2005,  and the related  statement of  operations  for the year then
ended,  the statements of changes in net assets for each of the two years in the
period then ended,  and the financial  highlights for each of the three years in
the period then ended. These financial  statements and financial  highlights are
the responsibility of the Fund's management. Our responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audits.  The financial  highlights for each of the two years in the period ended
December 31, 2002 were audited by other  auditors whose report dated January 31,
2003, expressed an unqualified opinion on those financial highlights.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material  misstatement.  We were
not engaged to perform an audit of the Fund's  internal  control over  financial
reporting.  Our audits included consideration of internal control over financial
reporting as a basis for designing audit  procedures that are appropriate in the
circumstances,  but  not  for  the  purpose  of  expressing  an  opinion  on the
effectiveness  of  the  Fund's  internal   control  over  financial   reporting.
Accordingly,  we express no such opinion. An audit also includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements and financial  highlights,  assessing the accounting  principles used
and  significant  estimates  made by  management,  and  evaluating  the  overall
financial  statement  presentation.  Our  procedures  included  confirmation  of
securities  owned as of December 31,  2005,  by  correspondence  with the Fund's
custodian.  We  believe  that our  audits  provide  a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of The
GAMCO Global  Telecommunications  Fund, a series of GAMCO Global  Series  Funds,
Inc.,  at December 31,  2005,  the results of its  operations  for the year then
ended,  the  changes  in its net  assets for each of the two years in the period
then  ended,  and the  financial  highlights  for each of the three years in the
period  then  ended,  in  conformity  with U.S.  generally  accepted  accounting
principles.

                                                           /s/ ERNST & YOUNG LLP

Philadelphia, Pennsylvania
February 14, 2006

                                       19


                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND

BOARD CONSIDERATION AND RE-APPROVAL OF INVESTMENT ADVISORY AGREEMENT (UNAUDITED)

During the six months ended  December  31,  2005,  the Board of Directors of the
Corporation  approved the continuation of the investment advisory agreement with
the Adviser  for the Fund on the basis of the  recommendation  by the  directors
(the "independent  directors") who are not "interested persons" of the Fund. The
following  paragraphs  summarize the material information and factors considered
by the  independent  directors  as well as their  conclusions  relative  to such
factors.

NATURE,  EXTENT AND QUALITY OF SERVICES.  The independent  directors  considered
information  regarding  the  portfolio  managers,  the depth of the analyst pool
available   to  the  Adviser   and  the   portfolio   managers,   the  scope  of
administrative,  shareholder,  and other services  supervised or provided by the
Adviser,  and the absence of significant service problems reported to the Board.
The  independent  directors  noted  the  experience,   length  of  service,  and
reputation of the portfolio managers.

INVESTMENT  PERFORMANCE.  The independent  directors reviewed the short, medium,
and   long-term   performance   of  the  Fund   against  a  peer  group  of  all
telecommunications funds, noting that the Fund's performance was in the top half
of its peer  group for the one and three year  periods  and in the top third for
the five year period.

PROFITABILITY.  The independent  directors  reviewed  summary data regarding the
profitability  of the Fund to the  Adviser  both with a pro rata  administrative
charge and with a standalone  administrative  charge.  The directors  also noted
that a substantial portion of the Fund's portfolio transactions were executed by
an  affiliated  broker of the Adviser and that the  affiliated  broker  received
distribution fees and minor amounts of sales commissions.

ECONOMIES OF SCALE.  The independent  directors  discussed the major elements of
the Adviser's cost structure and the relationship of those elements to potential
economies of scale and reviewed  rudimentary  data suggesting that 20% growth in
the Fund would not produce  meaningful  economies of scale that the shareholders
would not participate in.

SHARING  OF  ECONOMIES  OF  SCALE.  The  independent  directors  noted  that the
investment  advisory  fee  schedule  for the Fund does not take into account any
potential economies of scale that may develop.

SERVICE AND COST  COMPARISONS.  The independent  directors  compared the expense
ratios of the investment advisory fee, other expenses, and total expenses of the
Fund to similar expense ratios of the peer group of telecommunication  funds and
noted that the Adviser's advisory fee includes  substantially all administrative
services of the Fund as well as  investment  advisory  services.  The  directors
noted that the Fund's expense ratios were moderately higher, and the Fund's size
was moderately  lower,  than average within this group. The directors also noted
that the advisory fee  structure  was the same as that in effect for most of the
Gabelli/GAMCO funds. The directors were presented with, but did not compare, the
advisory fee to the fee for other types of accounts managed by the Adviser.

CONCLUSIONS.  The independent  directors  concluded that the Fund enjoyed highly
experienced  portfolio  management  services,  good  ancillary  services,  and a
moderately  above average  performance  record.  The independent  directors also
concluded that the Fund's expense ratios and the profitability to the Adviser of
managing  the Fund  were  reasonable,  and that  economies  of scale  were not a
significant  factor in their  thinking at this time.  The directors did not view
the potential profitability of ancillary services as material to their decision.
On the basis of the foregoing  and without  assigning  particular  weight to any
single   conclusion,   the   independent   directors   determined  to  recommend
continuation  of  the  investment  advisory  agreement  to  the  full  Board  of
Directors.

                                       20



THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================

The business and affairs of the Company are managed  under the  direction of the
Company's  Board of  Directors.  Information  pertaining  to the  Directors  and
officers of the Company is set forth below.  The Fund's  Statement of Additional
Information  includes  additional  information  about GAMCO Global Series Funds,
Inc.  Directors  and is available,  without  charge,  upon  request,  by calling
800-GABELLI  (800-422-3554)  or by writing to GAMCO Global Series Funds, Inc. at
One Corporate Center, Rye, NY 10580-1422.



                         TERM OF        NUMBER OF
                       OFFICE AND     FUNDS IN FUND
NAME, POSITION(S)       LENGTH OF        COMPLEX
    ADDRESS 1              TIME         OVERSEEN BY       PRINCIPAL OCCUPATION(S)                OTHER DIRECTORSHIPS
    AND AGE              SERVED 2        DIRECTOR         DURING PAST FIVE YEARS                  HELD BY DIRECTOR 4
- ----------------         --------       ----------        ----------------------                  ------------------
                                                                                      

INTERESTED DIRECTORS 3:
- ----------------------
MARIO J. GABELLI       Since 1993          24     Chairman of the Board and Chief Executive      Director of Morgan Group
Director and                                      Officer of GAMCO Investors, Inc.               Holdings, Inc.
Chief Investment Officer                          and Chief Investment Officer - Value           (holding company)
Age: 63                                           Portfolios of Gabelli Funds, LLC and
                                                  GAMCO Asset Management Inc.;
                                                  Chairman and Chief Executive Officer
                                                  of Lynch Interactive  Corporation
                                                  (multimedia and services)

JOHN D. GABELLI        Since 1993          10     Senior Vice President of Gabelli &             Director of
Director                                          Company, Inc.                                  GAMCO Investors, Inc.
Age: 61

NON-INTERESTED DIRECTORS:
- ------------------------
E. VAL  CERUTTI        Since 2001           7     Chief Executive Officer of Cerutti             Director of Lynch
Director                                          Consultants, Inc.; Adviser, Iona College       Corporation (diversified
Age: 66                                           School of Business                             manufacturing)

ANTHONY J. COLAVITA    Since 1993          34     Partner in the law firm of                         --
Director                                          Anthony J. Colavita, P.C.
Age: 70

ARTHUR V. FERRARA      Since 2001           6     Formerly, Chairman of the Board and Chief      Director of The Guardian Life
Director                                          Executive Officer of The Guardian Life         Insurance Company of America;
Age: 75                                           Insurance Company of America from January      Director of The Guardian
                                                  1993 to December 1995; President, Chief        Insurance and Annuity
                                                  Executive Officer and a Director               Company, Inc., Guardian
                                                  prior thereto                                  Investor Services LLC,
                                                                                                 and 25 mutual funds within
                                                                                                 the Guardian Fund Complex

WERNER J. ROEDER, MD   Since 1993          23     Medical Director of Lawrence Hospital              --
Director                                          and practicing private physician
Age: 65

ANTHONIE C. VAN EKRIS  Since 1993          18     Chairman of BALMAC International, Inc.             --
Director                                          (commodities and futures trading)
Age: 71

SALVATORE J. ZIZZA     Since 2004          25     Chairman of Hallmark Electrical                Director of Hollis-Eden
Director                                          Supplies Corp.                                 Pharmaceuticals (biotechnology);
Age: 60                                                                                          Director of Earl Scheib, Inc.
                                                                                                 (automotive services)


                                       21


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED) (CONTINUED)
================================================================================




                         TERM OF
                       OFFICE AND
NAME, POSITION(S)       LENGTH OF
    ADDRESS 1              TIME           PRINCIPAL OCCUPATION(S)
    AND AGE              SERVED 2         DURING PAST FIVE YEARS
- ----------------         --------         ----------------------
                                     

OFFICERS:
- --------
BRUCE N. ALPERT        Since 2003        Executive Vice President and Chief Operating and Treasurer
President and Treasurer                  Officer of Gabelli Funds, LLC since 1988 and an
Age: 54                                  officer of all of the registered investment companies
                                         in the Gabelli Funds complex. Director and President of
                                         Gabelli Advisers, Inc. since 1998.

JAMES E. MCKEE         Since 1995        Vice President, General Counsel and Secretary of GAMCO
Secretary                                Investors, Inc. since 1999 and GAMCO Asset
Age: 42                                  Management Inc. since 1993; Secretary of all of the
                                         registered investment companies in the Gabelli Funds complex.

PETER D. GOLDSTEIN     Since 2004        Director of Regulatory Affairs for GAMCO Investors, Inc.
Chief Compliance Officer                 since 2004; Chief Compliance Officer of all of the
Age: 52                                  registered investment companies in the Gabelli Funds complex;
                                         Vice President of Goldman Sachs Asset Management from
                                         2000 through 2004.


- ---------------------
 1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
 2 Each Director  will hold office for an indefinite  term until the earliest of
   (i) the next  meeting of  shareholders,  if any,  called  for the  purpose of
   considering  the  election  or  re-election  of such  Director  and until the
   election and  qualification of his or her successor,  if any, elected at such
   meeting,  or (ii) the date a Director  resigns or  retires,  or a Director is
   removed by the Board of Directors or  shareholders,  in  accordance  with the
   Company's  By-Laws and  Articles of  Incorporation.  Each  officer  will hold
   office for an indefinite  term until the date he or she resigns or retires or
   until his or her successor is elected and qualified.  Effective  November 16,
   2005, Mr. Karl Otto Pohl resigned from the Board  of Directors and now serves
   as Director Emeritus.
 3 "Interested  person" of the Company as defined in the Investment  Company Act
   of 1940. Messrs. M. Gabelli and J. Gabelli are each considered an "interested
   person" because of their  affiliation  with Gabelli Funds,  LLC which acts as
   the Company's  investment  adviser.  Mario J. Gabelli and John D. Gabelli are
   brothers.
 4 This column includes only  directorships  of companies  required to report to
   the SEC under the Securities  Exchange Act of 1934 (i.e. public companies) or
   other investment companies registered under the 1940 Act.

                                       22


THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED) (CONTINUED)
================================================================================

- --------------------------------------------------------------------------------
                   2005 TAX NOTICE TO SHAREHOLDERS (Unaudited)

   For the year ended December 31, 2005, the Fund paid to shareholders  ordinary
   income  dividends  (comprised  of net  investment  income)  totaling  $0.190,
   $0.196,  and  $0.010  per  share  for  Class  AAA,  Class  A,  and  Class  C,
   respectively.  For the year ended  December 31, 2005,  86.01% of the ordinary
   income dividend  qualifies for the dividend received  deduction  available to
   corporations  and 100% of the  ordinary  income  distribution  was  qualified
   dividend  income.  Also for the year ended December 31, 2005, the Fund passed
   through  foreign tax credits of $0.0425 per share to Class AAA,  Class A, and
   Class C  shareholders.  The foreign  source income and tax credits by country
   are presented in the table below. Visit  www.gabelli.com for more information
   about 2005 foreign source income and foreign taxes paid.

   U.S. GOVERNMENT INCOME:

   The percentage of the ordinary income dividend paid by the Fund during fiscal
   year 2005 which was derived from U.S.  Treasury  securities  was 0.92%.  Such
   income is exempt  from  state and  local  tax in all  states.  However,  many
   states,  including  New  York and  California,  allow a tax  exemption  for a
   portion of the income  earned only if a mutual fund has invested at least 50%
   of its assets at the end of each  quarter of the Fund's  fiscal  year in U.S.
   Government securities.  The GAMCO Global Telecommunications Fund did not meet
   this strict  requirement in 2005. Due to the diversity in state and local tax
   law, it is  recommended  that you consult your personal tax advisor as to the
   applicability of the information provided to your specific situation.
- --------------------------------------------------------------------------------

      FOREIGN SOURCE INCOME AND TAX CREDITS BY COUNTRY FOR 2005 (UNAUDITED)
                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
                    ----------------------------------------

                           Foreign Source    Foreign Qualifying
                              Income %            Income %         Foreign Tax %
                              --------            --------         -------------
         Australia               0.07                0.10               0.00
         Austria                 0.26                0.39               0.45
         Bermuda                 0.01                0.02               0.00
         Brazil                  2.03                2.96               2.99
         Canada                  6.90               10.07              11.40
         Chile                   1.86                2.72               5.97
         Denmark                 1.10                1.61               4.35
         Finland                 3.70                5.40               6.41
         France                 11.29               16.48              12.79
         Germany                 3.95                5.76              11.54
         Hong Kong               1.35                1.97               0.00
         Hungary                 0.01                0.02               0.04
         Indonesia               0.28                0.41               0.56
         Italy                   8.93               13.04              15.66
         Jamaica                 0.32                0.47               0.00
         Japan                   1.86                2.71               1.50
         Malaysia                0.51                0.75               0.00
         Mexico                  4.49                6.56               0.00
         Morroco                 0.01                0.01               0.00
         Netherlands             0.77                1.12               2.53
         New Zealand             1.32                1.92               2.66
         Pakistan                0.11                0.17               0.16
         Philippines             1.56                2.28               3.16
         Portugal                0.49                0.71               0.80
         Russia                  0.34                0.49               0.18
         Singapore               1.12                1.63               0.00
         South Africa            0.00                0.00               0.00
         South Korea             2.02                2.94               6.01
         Spain                   3.34                4.88               2.97
         Sweden                  2.19                3.20               3.77
         Switzerland             1.55                2.26               4.10
         United Kingdom          4.74                6.92               0.00

                                       23


                         GAMCO Global Series Funds, Inc.
                    THE GAMCO GLOBAL TELECOMMUNICATIONS FUND
                              One Corporate Center
                            Rye, New York 10580-1422
                                   800-GABELLI
                                  800-422-3554
                                FAX: 914-921-5118
                            WEBSITE: WWW.GABELLI.COM
                            E-MAIL: INFO@GABELLI.COM
                   Net Asset Value available daily by calling
                           800-GABELLI after 6:00 P.M.

                               BOARD OF DIRECTORS

Mario J. Gabelli, CFA                          John D. Gabelli
CHAIRMAN AND CHIEF                             SENIOR VICE PRESIDENT
EXECUTIVE OFFICER                              GABELLI & COMPANY, INC.
GAMCO INVESTORS, INC.

E. Val Cerutti                                 Werner J. Roeder,  MD
CHIEF EXECUTIVE OFFICER                        MEDICAL  DIRECTOR
CERUTTI CONSULTANTS, INC.                      LAWRENCE HOSPITAL

Anthony J. Colavita                            Anthonie C. van Ekris
ATTORNEY-AT-LAW                                MANAGING DIRECTOR
ANTHONY J. COLAVITA, P.C.                      BALMAC INTERNATIONAL, INC.

Arthur V. Ferrara                              Salvatore J.Zizza
FORMER CHAIRMAN AND                            CHAIRMAN
CHIEF EXECUTIVE OFFICER                        HALLMARK ELECTRICAL
GUARDIAN LIFE INSURANCE                        SUPPLIES CORP.
COMPANY OF AMERICA

                                    OFFICERS

Bruce N. Alpert                                James E. McKee
PRESIDENT AND TREASURER                        SECRETARY

Peter D. Goldstein
CHIEF COMPLIANCE OFFICER

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP



- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
GAMCO Global  Telecommunications  Fund. It is not authorized for distribution to
prospective investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB401Q405SR


                                                      [GRAPHIC OMITTED]
                                                      TRIANGLE ART

                                                      THE
                                                      GAMCO
                                                      GLOBAL
                                                      TELECOMMUNICATIONS
                                                      FUND



                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2005



ITEM 2. CODE OF ETHICS.

     (a)  The  registrant,  as of the end of the period  covered by this report,
          has  adopted  a code  of  ethics  that  applies  to  the  registrant's
          principal executive officer,  principal  financial officer,  principal
          accounting  officer  or  controller,  or  persons  performing  similar
          functions, regardless of whether these individuals are employed by the
          registrant or a third party.

     (c)  There  have been no  amendments,  during  the  period  covered by this
          report,  to a  provision  of the code of ethics  that  applies  to the
          registrant's principal executive officer, principal financial officer,
          principal  accounting  officer or  controller,  or persons  performing
          similar  functions,   regardless  of  whether  these  individuals  are
          employed by the  registrant or a third party,  and that relates to any
          element of the code of ethics description.

     (d)  The  registrant  has not granted any  waivers,  including  an implicit
          waiver,  from a provision  of the code of ethics  that  applies to the
          registrant's principal executive officer, principal financial officer,
          principal  accounting  officer or  controller,  or persons  performing
          similar  functions,   regardless  of  whether  these  individuals  are
          employed by the  registrant  or a third party,  that relates to one or
          more  of  the  items  set  forth  in  paragraph  (b)  of  this  item's
          instructions.

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

As of the end of the period  covered by the report,  the  registrant's  Board of
Directors  has  determined  that  Salvatore J. Zizza is qualified to serve as an
audit committee  financial  expert serving on its audit committee and that he is
"independent," as defined by Item 3 of Form N-CSR.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

AUDIT FEES

     (a)  The  aggregate  fees billed for each of the last two fiscal  years for
          professional  services  rendered by the principal  accountant  for the
          audit of the registrant's annual financial statements or services that
          are normally  provided by the accountant in connection  with statutory
          and  regulatory  filings or  engagements  for those  fiscal  years are
          $119,700 in 2005 and $105,600 in 2004.

AUDIT-RELATED FEES

     (b)  The  aggregate  fees  billed in each of the last two fiscal  years for
          assurance and related  services by the principal  accountant  that are
          reasonably related to the performance of the audit of the registrant's
          financial  statements and are not reported under paragraph (a) of this
          Item are $0 in 2005 and $0 in 2004.


TAX FEES

     (c)  The  aggregate  fees  billed in each of the last two fiscal  years for
          professional  services  rendered by the principal  accountant  for tax
          compliance,  tax  advice,  and tax  planning  are  $14,400 in 2005 and
          $13,600 in 2004.

          Tax fees represent tax compliance services provided in connection with
          the review of the Registrant's tax returns.

ALL OTHER FEES

     (d)  The  aggregate  fees  billed in each of the last two fiscal  years for
          products and services provided by the principal accountant, other than
          the services  reported in paragraphs  (a) through (c) of this Item are
          $0 in 2005 and $0 in 2004.

(e)(1)   Disclose the audit  committee's  pre-approval  policies and  procedures
         described in paragraph (c)(7) of Rule 2-01 of Regulation S-X.

         Pre-Approval Policies and Procedures. The Audit Committee ("Committee")
         of the registrant is responsible  for  pre-approving  (i) all audit and
         permissible  non-audit  services  to be  provided  by  the  independent
         auditors to the registrant and (ii) all permissible  non-audit services
         to be provided by the  independent  auditors  to the  Adviser,  Gabelli
         Funds,  LLC, and any affiliate of Gabelli Funds,  LLC ("Gabelli")  that
         provides services to the registrant (a "Covered Services  Provider") if
         the independent auditors' engagement related directly to the operations
         and financial  reporting of the registrant.  The Committee may delegate
         its  responsibility  to  pre-approve  any such  audit  and  permissible
         non-audit  services  to the  Chairperson  of  the  Committee,  and  the
         Chairperson  must  report  to  the  Committee,  at its  next  regularly
         scheduled  meeting  after  the   Chairperson's   pre-approval  of  such
         services,  his or her  decision(s).  The Committee  may also  establish
         detailed  pre-approval policies and procedures for pre-approval of such
         services in accordance with applicable  laws,  including the delegation
         of some or all of the Committee's pre-approval  responsibilities to the
         other  persons  (other  than  Gabelli  or the  registrant's  officers).
         Pre-approval by the Committee of any permissible  non-audit services is
         not  required  so  long  as:  (i)  the  aggregate  amount  of all  such
         permissible non-audit services provided to the registrant,  Gabelli and
         any Covered Services Provider constitutes not more than 5% of the total
         amount of revenues paid by the registrant to its  independent  auditors
         during the fiscal year in which the permissible  non-audit services are
         provided;  (ii) the permissible  non-audit services were not recognized
         by  the  registrant  at the  time  of the  engagement  to be  non-audit
         services; and (iii) such services are promptly brought to the attention
         of the Committee and approved by the Committee or Chairperson  prior to
         the completion of the audit.

  (e)(2) The percentage of services  described in each of paragraphs (b) through
         (d) of this Item that were approved by the audit committee  pursuant to
         paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X are as follows:

                           (b) N/A

                           (c) 100%

                           (d) N/A


     (f) The   percentage  of  hours  expended  on  the  principal  accountant's
         engagement to  audit the registrant's financial statements for the most
         recent fiscal  year that were  attributed to work  performed by persons
         other than  the principal accountant's  full-time,  permanent employees
         was zero percent (0%).

     (g) The aggregate non-audit fees billed by the registrant's  accountant for
         services  rendered to the registrant,  and rendered to the registrant's
         investment  adviser  (not  including  any  sub-adviser  whose  role  is
         primarily portfolio management and is subcontracted with or overseen by
         another investment adviser), and any entity controlling, controlled by,
         or under common control with the adviser that provides ongoing services
         to the  registrant  for  each  of the  last  two  fiscal  years  of the
         registrant was $79,400 in 2005 and $78,600 in 2004.

     (h) The  registrant's  audit  committee  of  the  board  of  directors  has
         considered  whether  the  provision  of  non-audit  services  that were
         rendered to the  registrant's  investment  adviser (not  including  any
         sub-adviser  whose  role  is  primarily  portfolio  management  and  is
         subcontracted with or overseen by another investment adviser),  and any
         entity  controlling,  controlled  by, or under common  control with the
         investment  adviser that provides  ongoing  services to the  registrant
         that were not  pre-approved  pursuant to paragraph  (c)(7)(ii)  of Rule
         2-01 of Regulation  S-X is compatible  with  maintaining  the principal
         accountant's independence.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.



ITEM 6. SCHEDULE OF INVESTMENTS.

Schedule of Investments in securities of unaffiliated issuers as of the close of
the  reporting  period is included as part of the report to  shareholders  filed
under Item 1 of this form.



ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END
        MANAGEMENT INVESTMENT COMPANIES.

Not applicable.



ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.



ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT
        COMPANY AND AFFILIATED PURCHASERS.

Not applicable.



ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There have been no material  changes to the procedures by which the shareholders
may  recommend  nominees to the  registrant's  Board of  Directors,  where those
changes were  implemented  after the  registrant  last  provided  disclosure  in
response to the  requirements  of Item  7(d)(2)(ii)(G)  of Schedule  14A (17 CFR
240.14a-101), or this Item.


ITEM 11. CONTROLS AND PROCEDURES.

     (a)  The registrant's principal executive and principal financial officers,
          or persons  performing  similar  functions,  have  concluded  that the
          registrant's  disclosure  controls and  procedures (as defined in Rule
          30a-3(c)  under the  Investment  Company Act of 1940,  as amended (the
          "1940 Act") (17 CFR 270.30a-3(c))) are effective,  as of a date within
          90 days of the filing date of the report that includes the  disclosure
          required  by this  paragraph,  based  on  their  evaluation  of  these
          controls and  procedures  required by Rule 30a-3(b) under the 1940 Act
          (17 CFR  270.30a-3(b))  and Rules  13a-15(b)  or  15d-15(b)  under the
          Securities  Exchange Act of 1934, as amended (17 CFR  240.13a-15(b) or
          240.15d-15(b)).


     (b)  There  were no  changes  in the  registrant's  internal  control  over
          financial  reporting (as defined in Rule  30a-3(d)  under the 1940 Act
          (17 CFR  270.30a-3(d))  that occurred during the  registrant's  second
          fiscal  quarter  of  the  period  covered  by  this  report  that  has
          materially affected, or is reasonably likely to materially affect, the
          registrant's internal control over financial reporting.


ITEM 12. EXHIBITS.

     (a)(1)   Code of ethics, or any  amendment thereto,  that is the subject of
              disclosure required by Item 2 is attached hereto.

     (a)(2)   Certifications  pursuant  to Rule  30a-2(a) under the 1940 Act and
              Section 302 of the Sarbanes-Oxley Act of 2002 are attached hereto.

     (a)(3)   Not applicable.

     (b)      Certifications  pursuant  to Rule  30a-2(b) under the 1940 Act and
              Section 906 of the Sarbanes-Oxley Act of 2002 are attached hereto.



                                   SIGNATURES

Pursuant to the  requirements  of the  Securities  Exchange  Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

(registrant)               GAMCO Global Series Funds, Inc.
            --------------------------------------------------------------------

By (Signature and Title)*  /s/ Bruce N. Alpert
                         -------------------------------------------------------
                           Bruce N. Alpert, Principal Executive Officer


Date     March 8, 2006
    ----------------------------------------------------------------------------


Pursuant to the  requirements  of the  Securities  Exchange  Act of 1934 and the
Investment  Company  Act of  1940,  this  report  has been  signed  below by the
following  persons on behalf of the  registrant and in the capacities and on the
dates indicated.



By (Signature and Title)*  /s/ Bruce N. Alpert
                         -------------------------------------------------------
                           Bruce N. Alpert, Principal Executive Officer &
                           Principal Financial Officer

Date     March 8, 2006
    ----------------------------------------------------------------------------



* Print the name and title of each signing officer under his or her signature.