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 811-04873
                                                    ------------

                              The GAMCO Growth Fund
             ------------------------------------------------------
               (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, 2006
                                            -------------------


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 GROWTH FUND

                                  ANNUAL REPORT
                                DECEMBER 31, 2006









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,  2006 with a  description  of  factors  that  affected  the
performance during the past year.

PERFORMANCE DISCUSSION (UNAUDITED)

     For the 12 months ended  December 31, 2006,  the Fund (Class AAA)  returned
6.28%  compared to 15.78% for the S&P 500 and 9.07% for the Russell  1000 Growth
Indices. The year 2006 was a year of two markets.  Fears of rising inflation and
interest  rates  generally kept prices from advancing in the first six months of
the year, as oil and commodity  prices soared.  Geopolitical  concerns about the
Middle  East and North  Korea  also kept  investors  on edge and  somewhat  risk
averse. The market (S&P 500) hit bottom on June 13th, at which point it was down
2% for the  year-to-date.  The back  half of the year was a  different  story as
commodity prices eased and the economy cooled,  allowing  interest rates to fall
while giving the Fed reason to pause following seventeen consecutive rate hikes.
The  threatening  rhetoric from Iran and North Korea  quieted down as well.  The
result was a smart  advance in share prices as the market  rallied about 16% off
the June low.

     As has been the pattern in recent  years,  the "value"  style  outperformed
"growth" and smaller cap stocks  outperformed  larger cap stocks. As a large cap
growth  fund,  The GAMCO Growth  Fund's  results  reflect  these  biases.  Being
overweight  energy  and  materials  for  most  of the  year  helped  the  Fund's
performance.  However,  the best performing  sector was telecom  services and we
were not exposed to this area  during the year,  given the low  earnings  growth
rates of most of the telecom companies. For similar reasons, we were underweight
utilities  and  financials,  two other  sectors  that  outperformed  the broader
market. The Fund was overweight health care, information technology, industrials
and consumer  staples.  All four sectors  underperformed  the market with health
care and  technology  being the biggest  laggards,  although  their returns were
positive.

     The Fund's  best  performers  for the year  included  Allegheny  Technology
(+153%),  Cisco  Systems  (+60%),  Groupe Danone  (+57%),  Goldman Sachs (+57%),
Credit  Suisse  (+41%),   Merrill  Lynch  (+39%),   Commercial   Metals  (+39%),
McGraw-Hill  (+33%),  General Dynamics (+32%),  and Schlumberger  (+31%). At the
other end of the spectrum,  hurting performance were Yahoo! (-35%), eBay (-30%),
St. Jude Medical  (-27%),  Intel  (-17%),  Dell (-16%),  Genzyme  (-13%),  Alcon
(-13%), Genentech (-12%), Qualcomm (-11%), and Texas Instruments (-10%).

                                                           Sincerely yours,

                                                           /s/ Bruce N. Alpert

                                                           Bruce N. Alpert
                                                           President
January 22, 2007



            COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN
                   THE GAMCO GROWTH FUND AND THE S&P 500 INDEX

                               [GRAPHIC OMITTED]
                              PLOT POINTS FOLLOW:

                                 GAMCO Growth Fund
                                         Class AAA                 S&P 500 Index
4/10/87                                   $ 10,000                       $10,000
12/31/87                                     9,510                         8,447
12/31/88                                    13,234                         9,846
12/31/89                                    18,542                        12,961
12/31/90                                    18,173                        12,558
12/31/91                                    24,410                        16,375
12/31/92                                    25,506                        17,621
12/31/93                                    28,378                        19,394
12/31/94                                    27,414                        19,648
12/31/95                                    36,383                        27,022
12/31/96                                    43,449                        33,224
12/31/97                                    61,971                        44,304
12/31/98                                    80,426                        56,975
12/31/99                                   117,623                        68,956
12/31/00                                   105,191                        62,681
12/31/01                                    79,840                        55,235
12/31/02                                    52,862                        43,033
12/31/03                                    69,450                        55,371
12/31/04                                    72,707                        61,390
12/31/05                                    80,196                        64,404
12/31/06                                    85,232                        74,567

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, 2006 (A)
                                                                                                             Since
                                                                                                           Inception
                                                Quarter    1 Year    3 Year    5 Year   10 Year   15 Year  (4/10/87)
- ---------------------------------------------------------------------------------------------------------------------
                                                                                       
   GAMCO GROWTH FUND CLASS AAA (B) ............  5.73%     6.28%     7.06%     1.32%    6.97%      8.70%    11.48%
   S&P 500 Index ..............................  6.69     15.78     10.43      6.18     8.42      10.63     10.71
   Russell 1000 Growth Index ..................  5.93      9.07      6.87      2.69     5.44       8.02      9.41

   Class A ....................................  5.73      6.28      7.08      1.32     6.98       8.70     11.48
                                                (0.35)(c)  0.17(c)   4.98(c)   0.13(c)  6.34(c)    8.27(c)  11.14(c)

   Class B ....................................  5.53      5.50      6.27      0.86     6.73       8.53     11.35
                                                 0.53(d)   0.50(d)   5.37(d)   0.47(d)  6.73(d)    8.53(d)  11.35(d)

   Class C ....................................  5.53      5.50      6.27      0.86     6.73       8.53     11.35
                                                 4.53(e)   4.50(e)   6.27      0.86     6.73       8.53     11.35

 (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 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.
     PERFORMANCE  RETURNS  FOR  PERIODS  LESS THAN ONE YEAR ARE NOT  ANNUALIZED.
     CURRENT  PERFORMANCE  MAY BE LOWER OR  HIGHER  THAN  THE  PERFORMANCE  DATA
     PRESENTED. VISIT WWW.GABELLI.COM FOR PERFORMANCE INFORMATION AS OF THE MOST
     RECENT  MONTH END.  INVESTORS  SHOULD  CAREFULLY  CONSIDER  THE  INVESTMENT
     OBJECTIVES,  RISKS, CHARGES, AND EXPENSES OF THE FUND 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 DECEMBER 31,  2003.  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 S&P 500
     INDEX AND THE  RUSSELL  1000 GROWTH INDEX ARE UNMANAGED INDICATORS OF STOCK
     MARKET  PERFORMANCE.  DIVIDENDS ARE REINVESTED. YOU CAN NOT INVEST DIRECTLY
     IN AN INDEX.
 (b) EFFECTIVE FEBRUARY 15, 2007, CLASS AAA SHARES ARE ONLY OFFERED TO INVESTORS
     WHO ARE SHAREHOLDERS IN ONE OR MORE OF THE REGISTERED FUNDS  DISTRIBUTED BY
     GABELLI & COMPANY, INC. PRIOR TO FEBRUARY 15, 2007.
 (c) INCLUDES THE EFFECT OF THE MAXIMUM  5.75% SALES CHARGE AT THE  BEGINNING OF
     THE PERIOD.
 (d) PERFORMANCE  RESULTS  INCLUDE THE  DEFERRED  SALES  CHARGES FOR THE CLASS B
     SHARES UPON  REDEMPTION  AT THE END OF THE QUARTER,  ONE YEAR,  THREE YEAR,
     FIVE YEAR, TEN YEAR,  FIFTEEN YEAR, AND SINCE INCEPTION  PERIODS OF 5%, 5%,
     3%,  2%,  0%,  0%,  AND 0%,  RESPECTIVELY  OF THE FUND'S NAV AT THE TIME OF
     PURCHASE OR SALE,  WHICHEVER IS LOWER. CLASS B SHARES ARE NOT AVAILABLE FOR
     NEW PURCHASES.
 (e) PERFORMANCE  RESULTS  INCLUDE THE  DEFERRED  SALES  CHARGES FOR THE CLASS C
     SHARES UPON REDEMPTION AT THE END OF THE QUARTER AND ONE YEAR PERIODS OF 1%
     OF THE FUND'S NAV AT THE TIME OF PURCHASE OR SALE, WHICHEVER IS LOWER.

- --------------------------------------------------------------------------------

                                       2


THE GAMCO GROWTH FUND
DISCLOSURE OF FUND EXPENSES (UNAUDITED)
For the Six Month Period from July 1, 2006 through December 31, 2006
                                                                   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, 2006.

                              Beginning       Ending      Annualized   Expenses
                            Account Value  Account Value   Expense   Paid During
                              07/01/06       12/31/06       Ratio      Period*
- --------------------------------------------------------------------------------
THE GAMCO GROWTH FUND
- --------------------------------------------------------------------------------

ACTUAL FUND RETURN
Class AAA                    $1,000.00      $1,068.00       1.38%      $ 7.19
Class A                      $1,000.00      $1,068.00       1.39%      $ 7.25
Class B                      $1,000.00      $1,064.00       2.14%      $11.13
Class C                      $1,000.00      $1,064.00       2.13%      $11.08
HYPOTHETICAL 5% RETURN
Class AAA                    $1,000.00      $1,018.25       1.38%      $ 7.02
Class A                      $1,000.00      $1,018.20       1.39%      $ 7.07
Class B                      $1,000.00      $1,014.42       2.14%      $10.87
Class C                      $1,000.00      $1,014.47       2.13%      $10.82

* 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, 2006:

THE GAMCO GROWTH FUND

Financial ....................................... 17.5%
Industrial ...................................... 14.4%
Software & Services ............................. 13.2%
Energy ..........................................  8.6%
Consumer Staples ................................  8.2%
Retail ..........................................  6.0%
Health Care Equipment & Services ................  5.7%
Media ...........................................  4.4%
Pharmaceuticals & Biotechnology .................  4.3%
Communications Equipment ........................  3.4%
Semiconductors ..................................  3.2%
U.S. Government Obligations .....................  2.6%
Materials .......................................  2.6%
Hotels and Gaming ...............................  2.3%
Computers & Peripheral ..........................  2.1%
Telecommunications ..............................  1.3%
Auto & Components ...............................  0.5%
Other Assets and Liabilities (Net) .............. (0.3)%
                                                 -------
                                                 100.0%
                                                 =======


THE FUND FILES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS WITH THE SECURITIES AND
EXCHANGE  COMMISSION (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, 2006.  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
SEC'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 is available without charge,  upon request, by
(i) calling 800-GABELLI (800-422-3554); (ii) writing to The Gabelli Funds at One
Corporate  Center,  Rye, NY  10580-1422;  or (iii) visiting the SEC's website at
www.sec.gov.

                                       4


THE GAMCO GROWTH FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2006
================================================================================

                                                            MARKET
    SHARES                                     COST          VALUE
    ------                                     ----         ------
              COMMON STOCKS -- 97.7%
              CONSUMER DISCRETIONARY -- 13.2%
              AUTO & COMPONENTS -- 0.5%
      50,000  Harman International
                Industries Inc. ...........$  4,153,590  $  4,995,500
                                           ------------  ------------
              HOTELS AND GAMING -- 2.3%
     215,000  Hilton Hotels Corp. .........   6,210,821     7,503,500
     130,000  Marriott International Inc.,
                Cl. A .....................   4,964,584     6,203,600
     130,000  Starwood Hotels & Resorts
                Worldwide Inc. ............   7,880,750     8,125,000
                                           ------------  ------------
                                             19,056,155    21,832,100
                                           ------------  ------------
              MEDIA -- 4.4%
     230,000  Comcast Corp., Cl. A+ .......   8,828,042     9,735,900
     290,000  News Corp., Cl. B ...........   5,837,170     6,455,400
     100,000  The McGraw-Hill
                Companies Inc. ............   2,638,875     6,802,000
     545,000  Time Warner Inc. ............   9,589,556    11,870,100
     180,000  Viacom Inc., Cl. B+ .........   6,854,964     7,385,400
                                           ------------  ------------
                                             33,748,607    42,248,800
                                           ------------  ------------
              RETAIL -- 6.0%
      50,000  Best Buy Co. Inc. ...........   2,638,232     2,459,500
     240,000  Coach Inc.+ .................   7,942,623    10,310,400
     160,000  Costco Wholesale Corp. ......   8,090,259     8,459,200
     125,000  Kohl's Corp.+ ...............   8,042,267     8,553,750
     160,000  Lowe's Companies Inc. .......   4,774,856     4,984,000
     150,000  Staples Inc. ................   3,868,509     4,005,000
      90,000  Starbucks Corp.+ ............   2,540,315     3,187,800
     130,000  Target Corp. ................   6,527,605     7,416,500
     163,400  Tiffany & Co. ...............   4,421,159     6,411,816
      80,000  Urban Outfitters Inc.+ ......   2,482,067     1,842,400
                                           ------------  ------------
                                             51,327,892    57,630,366
                                           ------------  ------------
              TOTAL CONSUMER
                DISCRETIONARY ............. 108,286,244   126,706,766
                                           ------------  ------------
              CONSUMER STAPLES -- 8.2%
     195,200  Groupe Danone, ADR ..........   4,422,265     6,363,520
     330,000  PepsiCo Inc. ................  15,928,420    20,641,500
     345,000  Procter & Gamble Co. ........  18,770,627    22,173,150
      80,000  The Hershey Co. .............   4,247,481     3,984,000
     100,000  Wal-Mart Stores Inc. ........   5,020,961     4,618,000
     240,000  Walgreen Co. ................   7,534,641    11,013,600
     120,000  Whole Foods Market Inc. .....   5,929,425     5,631,600
      70,000  Wm. Wrigley Jr. Co. .........   3,369,035     3,620,400
                                           ------------  ------------
              TOTAL
                CONSUMER STAPLES ..........  65,222,855    78,045,770
                                           ------------  ------------
              ENERGY -- 8.6%
     106,000  Apache Corp. ................   5,904,360     7,050,060
      60,000  Cameron International
               Corp.+ .....................   3,116,552     3,183,000
      10,000  Diamond Offshore
               Drilling Inc. ..............     846,112       799,400
      20,000  ENSCO International Inc. ....   1,103,278     1,001,200
      90,000  EOG Resources Inc. ..........   6,740,730     5,620,500
      10,000  GlobalSantaFe Corp. .........     630,400       587,800
     120,000  Halliburton Co. .............   4,513,372     3,726,000
     210,000  Hess Corp. ..................   9,728,283    10,409,700
      75,000  McDermott
               International Inc.+ ........   3,482,355     3,814,500
     110,000  National-Oilwell
               Varco Inc.+ ................   6,823,182     6,729,800
     105,000  Noble Corp. .................   7,705,536     7,995,750
     150,000  Occidental
               Petroleum Corp. ............   7,482,776     7,324,500
      50,000  Sasol Ltd., ADR .............   2,070,546     1,845,000
     118,000  Schlumberger Ltd. ...........   5,043,783     7,452,880
      60,000  Transocean Inc.+ ............   3,500,108     4,853,400
      90,000  Weatherford
               International Ltd.+ ........   4,206,845     3,761,100
     135,000  XTO Energy Inc. .............   6,013,622     6,351,750
                                           ------------  ------------
              TOTAL ENERGY ................  78,911,840    82,506,340
                                           ------------  ------------
              FINANCIAL -- 17.5%
      70,000  Affiliated Managers
                Group Inc.+ ...............   6,953,475     7,359,100
     345,000  American Express Co. ........  15,667,564    20,931,150
     300,000  American International
                Group Inc. ................  20,264,387    21,498,000
     101,600  China Life Insurance Co.
                Ltd., ADR .................   2,380,070     5,131,816
     300,000  Citigroup Inc. ..............  14,193,587    16,710,000
     180,000  Credit Suisse Group, ADR ....  10,235,430    12,573,000
      90,000  Goldman Sachs Group Inc. ....  13,522,118    17,941,500
      50,000  Legg Mason Inc. .............   5,644,091     4,752,500
     115,000  Merrill Lynch & Co. Inc. ....   5,198,116    10,706,500
     195,900  Northern Trust Corp. ........  11,288,088    11,889,171
      70,000  SEI Investments Co. .........   3,150,029     4,169,200
     178,800  State Street Corp. ..........   8,564,508    12,058,272
     100,000  T. Rowe Price Group Inc. ....   4,117,761     4,377,000
     180,000  UBS AG ......................   7,906,730    10,859,400
     190,000  Wells Fargo & Co. ...........   6,842,617     6,756,400
                                           ------------  ------------
              TOTAL FINANCIAL ............. 135,928,571   167,713,009
                                           ------------  ------------
              HEALTH CARE -- 10.0%
              HEALTH CARE EQUIPMENT & SERVICES -- 5.7%
     110,000  Alcon Inc. ..................  11,714,300    12,294,700
     130,000  St. Jude Medical Inc.+ ......   4,687,792     4,752,800
     190,000  Stryker Corp. ...............   9,448,284    10,470,900
     210,000  UnitedHealth Group Inc. .....  10,774,917    11,283,300
     110,000  Varian Medical
                Systems Inc.+ .............   4,398,555     5,232,700
     135,000  Zimmer Holdings Inc.+ .......   9,517,973    10,581,300
                                           ------------  ------------
                                             50,541,821    54,615,700
                                           ------------  ------------

                 See accompanying notes to financial statements.

                                       5


THE GAMCO GROWTH FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2006
================================================================================

                                                            MARKET
    SHARES                                     COST          VALUE
    ------                                     ----         ------
              COMMON STOCKS (CONTINUED)
              HEALTH CARE (CONTINUED)
              PHARMACEUTICALS & BIOTECHNOLOGY -- 4.3%
     175,000  Genentech Inc.+ .............$ 14,300,856  $ 14,197,750
      55,000  Genzyme Corp.+ ..............   3,254,081     3,386,900
      60,000  Gilead Sciences Inc.+ .......   3,899,902     3,895,800
     164,000  Johnson & Johnson ...........   8,665,669    10,827,280
      60,000  Novartis AG, ADR ............   3,618,857     3,446,400
      65,000  Novo Nordisk A/S, ADR .......   4,872,371     5,435,950
                                           ------------  ------------
                                             38,611,736    41,190,080
                                           ------------  ------------
              TOTAL HEALTH CARE ...........  89,153,557    95,805,780
                                           ------------  ------------
              INDUSTRIAL -- 14.4%
      40,000  3M Co. ......................   3,314,686     3,117,200
      45,000  C.H. Robinson
                Worldwide Inc. ............   1,029,858     1,840,050
      55,000  Caterpillar Inc. ............   2,453,473     3,373,150
     260,000  Emerson Electric Co. ........  10,996,470    11,463,400
      50,000  Expeditors International of
                Washington Inc. ...........   1,228,395     2,025,000
      90,000  FedEx Corp. .................  10,011,994     9,775,800
      35,000  Fluor Corp. .................   1,629,609     2,857,750
     132,000  General Dynamics Corp. ......   4,643,555     9,814,200
     970,000  General Electric Co. ........  33,537,890    36,093,700
     270,000  ITT Corp. ...................  12,446,819    15,341,400
     135,000  L-3 Communications
                Holdings Inc. .............   7,612,756    11,040,300
      90,000  Lockheed Martin Corp. .......   7,147,235     8,286,300
     120,000  Rockwell Collins Inc. .......   6,983,174     7,594,800
     195,000  United Technologies Corp. ...   9,358,355    12,191,400
      92,600  UTI Worldwide Inc. ..........   2,538,574     2,768,740
                                           ------------  ------------
              TOTAL INDUSTRIAL ............ 114,932,843   137,583,190
                                           ------------  ------------
              INFORMATION TECHNOLOGY -- 23.2%
              COMMUNICATIONS EQUIPMENT -- 3.4%
     946,000  Cisco Systems Inc.+ .........  18,965,226    25,854,180
      60,000  Harris Corp. ................   2,686,890     2,751,600
     111,000  QUALCOMM Inc. ...............   4,336,542     4,194,690
                                           ------------  ------------
                                             25,988,658    32,800,470
                                           ------------  ------------
              COMPUTERS & PERIPHERAL -- 2.1%
     170,000  Apple Computer Inc.+ ........  12,947,530    14,422,800
     120,000  Dell Inc.+ ..................   4,395,364     3,010,800
      90,000  Logitech International SA+ ..   2,069,367     2,573,100
                                           ------------  ------------
                                             19,412,261    20,006,700
                                           ------------  ------------
              SEMICONDUCTORS -- 3.2%
      55,000  Broadcom Corp., Cl. A+ ......   1,659,806     1,777,050
     625,000  Intel Corp. .................  22,610,350    12,656,250
     150,000  Microchip Technology Inc. ...   4,082,622     4,905,000
      80,000  NVIDIA Corp.+ ...............   3,019,844     2,960,800
     306,000  Texas Instruments Inc. ......   9,034,496     8,812,800
                                           ------------  ------------
                                             40,407,118    31,111,900
                                           ------------  ------------

                                                            MARKET
    SHARES                                     COST          VALUE
    ------                                     ----         ------
              SOFTWARE & SERVICES -- 13.2%
     475,000  Adobe Systems Inc.+ .........$ 16,654,998  $ 19,532,000
      50,000  Autodesk Inc.+ ..............   1,855,303     2,023,000
     270,000  eBay Inc.+ ..................  11,534,823     8,118,900
      79,900  Google Inc., Cl. A+ .........  23,393,530    36,792,352
   1,280,000  Microsoft Corp. .............  33,305,350    38,220,800
     135,000  NAVTEQ Corp.+ ...............   5,718,959     4,720,950
      55,000  Trimble Navigation Ltd.+ ....   2,524,326     2,790,150
     555,000  Yahoo! Inc.+ ................  19,433,128    14,174,700
                                           ------------  ------------
                                            114,420,417   126,372,852
                                           ------------  ------------
              TELECOMMUNICATIONS -- 1.3%
     235,000  Corning Inc.+ ...............   5,536,254     4,396,850
     230,000  Motorola Inc. ...............   5,794,813     4,728,800
      89,900  NeuStar Inc., Cl. A+ ........   3,114,186     2,916,356
                                           ------------  ------------
                                             14,445,253    12,042,006
                                           ------------  ------------
              TOTAL INFORMATION
                TECHNOLOGY ................ 214,673,707   222,333,928
                                           ------------  ------------
              MATERIALS -- 2.6%
      40,000  Allegheny Technologies Inc. .   1,702,076     3,627,200
     105,000  BHP Billiton Ltd., ADR ......   4,401,903     4,173,750
     133,000  Commercial Metals Co. .......   2,355,486     3,431,400
      65,000  Freeport-McMoRan Copper
                & Gold Inc., Cl. B ........   3,495,383     3,622,450
      85,000  Newmont Mining Corp. ........   4,217,267     3,837,750
      25,000  Phelps Dodge Corp. ..........   2,498,841     2,993,000
      15,000  Rio Tinto plc, ADR ..........   2,923,215     3,187,350
                                           ------------  ------------
              TOTAL MATERIALS .............  21,594,171    24,872,900
                                           ------------  ------------
              TOTAL
                COMMON STOCKS ............. 828,703,788   935,567,683
                                           ------------  ------------
   PRINCIPAL
    AMOUNT
   -------
              U.S. GOVERNMENT OBLIGATIONS -- 2.6%
$25,113,000   U.S. Treasury Bills,
                4.845% to 4.983%++,
                01/04/07 to 04/05/07 ......  24,881,899    24,892,569
                                           ------------  ------------
              TOTAL
                INVESTMENTS -- 100.3% .....$853,585,687   960,460,252
                                           ============
              OTHER ASSETS AND LIABILITIES
               (NET) -- (0.3)% .........................   (2,682,756)
                                                         ------------
              NET ASSETS -- 100.0% ..................... $957,777,496
                                                         ============
- ----------------
  +  Non-income producing security.
  ++ Represents annualized yield at date of purchase.
 ADR American Depository Receipt

                 See accompanying notes to financial statements.

                                       6


                              THE GAMCO GROWTH FUND

STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2006
================================================================================

ASSETS:
  Investments, at value (cost $853,585,687) ..............   $   960,460,252
  Dividends receivable ...................................           800,108
  Receivable for Fund shares sold ........................           291,992
  Prepaid expense ........................................            34,164
                                                             ---------------
  TOTAL ASSETS ...........................................       961,586,516
                                                             ---------------
LIABILITIES:
  Payable to custodian ...................................             5,560
  Payable for Fund shares redeemed .......................         1,947,083
  Payable for investment advisory fees ...................           825,301
  Payable for shareholder services fees ..................           607,447
  Payable for distribution fees ..........................           206,771
  Payable for accounting fees ............................             7,501
  Other accrued expenses .................................           209,357
                                                             ---------------
  TOTAL LIABILITIES ......................................         3,809,020
                                                             ---------------
  NET ASSETS applicable to 31,283,170
    shares outstanding ...................................   $   957,777,496
                                                             ===============
NET ASSETS CONSIST OF:
  Paid-in capital, each class at $0.01 par value .........   $ 1,788,297,490
  Accumulated net realized loss on investments ...........      (937,394,559)
  Net unrealized appreciation on investments .............       106,874,565
                                                             ---------------
  NET ASSETS .............................................   $   957,777,496
                                                             ===============
SHARES OF BENEFICIAL INTEREST:
  CLASS AAA:
  Net Asset Value, offering and redemption price
    per share ($956,810,868 / 31,251,086 shares
    outstanding; unlimited number of shares
    authorized) ..........................................            $30.62
                                                                      ======
  CLASS A:
  Net Asset Value and redemption price per share
    ($276,329 / 9,022 shares outstanding;
    unlimited number of shares authorized) ...............            $30.63
                                                                      ======
  Maximum offering price per share (NAV / .9425,
    based on maximum sales charge of 5.75%
    of the offering price) ...............................            $32.50
                                                                      ======
  CLASS B:
  Net Asset Value and offering price per share
    ($289,099 / 9,658 shares outstanding;
    unlimited number of shares authorized) ...............            $29.93(a)
                                                                      ======
  CLASS C:
  Net Asset Value and offering price per share
    ($401,200 / 13,404 shares outstanding;
    unlimited number of shares authorized) ...............            $29.93(a)
                                                                      ======
- ------------------
(a) Redemption price varies based on the length of time held.


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2006
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $194,267) ............       $  12,330,420
  Interest ................................................             719,547
                                                                  -------------
  TOTAL INVESTMENT INCOME .................................          13,049,967
                                                                  -------------
EXPENSES:
  Investment advisory fees ................................          10,419,074
  Distribution fees - Class AAA ...........................           2,602,347
  Distribution fees - Class A .............................                 704
  Distribution fees - Class B .............................               2,780
  Distribution fees - Class C .............................               4,357
  Shareholder services fees ...............................           1,246,001
  Shareholder communications expenses .....................             227,713
  Custodian fees ..........................................             139,865
  Trustees' fees ..........................................              68,500
  Legal and audit fees ....................................              67,538
  Accounting fees .........................................              45,000
  Registration expenses ...................................              39,744
  Interest expense ........................................               5,501
  Miscellaneous expenses ..................................             118,584
                                                                  -------------
  TOTAL EXPENSES ..........................................          14,987,708
  Less: Custodian fee credits .............................              (2,089)
                                                                  -------------
  NET EXPENSES ............................................          14,985,619
                                                                  -------------
  NET INVESTMENT LOSS .....................................          (1,935,652)
                                                                  -------------
NET REALIZED AND UNREALIZED GAIN (LOSS)
  ON INVESTMENTS:
  Net realized gain on investments ........................         124,028,687
  Net change in unrealized appreciation/
    depreciation on investments ...........................         (60,720,080)
                                                                  -------------
  NET REALIZED AND UNREALIZED GAIN (LOSS)
    ON INVESTMENTS ........................................          63,308,607
                                                                  -------------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS .......................................       $  61,372,955
                                                                  =============

                 See accompanying notes to financial statements.

                                       7


                              THE GAMCO GROWTH FUND


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


                                                                                 YEAR ENDED          YEAR ENDED
                                                                              DECEMBER 31, 2006   DECEMBER 31, 2005
                                                                              -----------------   -----------------
                                                                                            
OPERATIONS:
  Net investment loss ......................................................   $    (1,935,652)   $    (6,096,798)
  Net realized gain on investments .........................................       124,028,687        117,060,872
  Net change in unrealized appreciation/depreciation on investments ........       (60,720,080)         5,770,520
                                                                               ---------------    ---------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS .....................        61,372,955        116,734,594
                                                                               ---------------    ---------------
SHARES OF BENEFICIAL INTEREST TRANSACTIONS:
  Class AAA ................................................................      (244,152,530)      (424,688,588)
  Class A ..................................................................           (14,124)           192,347
  Class C ..................................................................          (176,602)           272,594
                                                                               ---------------    ---------------
  NET DECREASE IN NET ASSETS FROM SHARES OF BENEFICIAL INTEREST TRANSACTIONS      (244,343,256)      (424,223,647)
                                                                               ---------------    ---------------
  REDEMPTION FEES ..........................................................             6,591             25,950
                                                                               ---------------    ---------------
  NET DECREASE IN NET ASSETS ...............................................      (182,963,710)      (307,463,103)
NET ASSETS:
  Beginning of period ......................................................     1,140,741,206      1,448,204,309
                                                                               ---------------    ---------------
  End of period (including undistributed net investment income
    of $0 and $0, respectively) ............................................   $   957,777,496    $ 1,140,741,206
                                                                               ===============    ===============


THE GAMCO GROWTH FUND
NOTES TO FINANCIAL STATEMENTS
================================================================================


1. ORGANIZATION. The GAMCO Growth Fund (the "Fund"), formerly The Gabelli Growth
Fund, was organized on October 24, 1986 as a Massachusetts  business trust.  The
Fund is a diversified  open-end  management  investment company registered under
the  Investment  Company Act of 1940,  as amended (the "1940  Act").  The Fund's
primary  objective  is  capital  appreciation.  The  Fund  commenced  investment
operations on April 10, 1987.

2. SIGNIFICANT  ACCOUNTING POLICIES.  The preparation of financial statements in
accordance with United States ("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 Trustees (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").

                                       8


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


Portfolio  securities  primarily traded on a foreign market are generally valued
at the preceding  closing values of such securities on the relevant market,  but
may be fair valued  pursuant to  procedures  established  by the Board if market
conditions change  significantly after the close of the foreign market but prior
to the  close of  business  on the day the  securities  are being  valued.  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 fair valued 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
fair  valued as  determined  by 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.

In September 2006, the Financial  Accounting Standards Board (the "FASB") issued
Statement  of  Financial   Accounting   Standards   ("SFAS")   157,  Fair  Value
Measurements,  which  clarifies  the  definition  of  fair  value  and  requires
companies  to expand  their  disclosure  about the use of fair  value to measure
assets and  liabilities  in interim  and annual  periods  subsequent  to initial
recognition.  Adoption of SFAS 157  requires  the use of the price that would be
received  to sell  an  asset  or paid to  transfer  a  liability  in an  orderly
transaction  between market  participants at the  measurement  date. SFAS 157 is
effective  for  financial  statements  issued for fiscal years  beginning  after
November 15, 2007, and interim  periods within those fiscal years. At this time,
management is in the process of reviewing the  requirements  of SFAS 157 against
its current valuation policies to determine future applicability.

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.

                                       9


THE GAMCO GROWTH 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 AND INTEREST EXPENSE. 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, if any, shown as "custodian fee credits". When cash balances are
overdrawn, the Fund is charged an overdraft fee equal to 2.00% above the Federal
Funds rate on  outstanding  balances.  This  amount,  if any,  would be shown as
"interest expense" in the Statement of Operations.

DISTRIBUTIONS TO SHAREHOLDERS. 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  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund.  These book/tax  differences  are either  temporary or permanent in
nature. To the extent these  differences are permanent,  adjustments are made to
the  appropriate  capital  accounts  in the period when the  differences  arise.
Permanent  differences  for the  fiscal  year  ended  December  31,  2006,  were
primarily    attributable   to   unutilized   net   operating   losses.    These
reclassifications  have no impact on the NAV of the Fund.  For the  fiscal  year
ended December 31, 2006, reclassifications were made to decrease accumulated net
investment loss by $1,935,652, with an offsetting adjustment to paid-in capital.

No  distributions  were made during the fiscal years ended December 31, 2006 and
December 31, 2005.

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.

At December 31, 2006, the difference between book basis and tax basis unrealized
appreciation  was  primarily  due to  deferral of losses from wash sales for tax
purposes.

As of December 31, 2006, the components of  accumulated  earnings/(losses)  on a
tax basis were as follows:

        Accumulated capital loss carryforwards .................  $(930,720,149)
        Net unrealized appreciation ............................    100,200,155
                                                                  -------------
        Total accumulated loss .................................  $(830,519,994)
                                                                  =============

                                       10


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


At December 31, 2006,  the Fund had net capital loss  carryforwards  for Federal
income tax  purposes  of  $930,720,149,  which are  available  to reduce  future
required  distributions  of net capital gains to  shareholders.  $579,527,980 is
available  through 2010;  $350,050,494 is available through 2011; and $1,141,675
is available through 2012. For the fiscal year ended December 31, 2006, the Fund
utilized capital loss carryforwards of $121,623,325.

The following  summarizes the tax cost of investments and the related unrealized
appreciation/(depreciation) at December 31, 2006:

                                        GROSS          GROSS
                                     UNREALIZED     UNREALIZED    NET UNREALIZED
                          COST      APPRECIATION   DEPRECIATION    APPRECIATION
                          ----      ------------   ------------   --------------
   Investments .......$860,260,097  $137,814,860   $(37,614,705)   $100,200,155

In July 2006, the FASB issued Interpretation No. 48, "Accounting for Uncertainty
in  Income  Taxes,   an   Interpretation   of  FASB  Statement  No.  109"  ("the
Interpretation").  The  Interpretation  establishes for all entities,  including
pass-through  entities  such as the Fund,  a  minimum  threshold  for  financial
statement  recognition  of the benefit of positions  taken in filing tax returns
(including  whether  an entity is  taxable in a  particular  jurisdiction),  and
requires certain expanded tax disclosures.  The Interpretation is required to be
implemented  for a  calendar-year  open-end fund no later than its June 29, 2007
NAV, and is to be applied to all open tax years as of the date of effectiveness.
Management has begun to evaluate the  application of the  Interpretation  to the
Fund, and is not in a position at this time to estimate the  significance of its
impact, if any, on the Fund's financial statements.

3. INVESTMENT  ADVISORY AGREEMENT AND OTHER  TRANSACTIONS.  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 Trustees of the Fund who are affiliated persons
of the Adviser.

The Fund pays each Trustee that is not considered to be an affiliated  person an
annual retainer of $6,000 plus $500 for each Board meeting attended and they are
reimbursed for any out of pocket expenses  incurred in attending  meetings.  All
Board committee  members  receive $500 per meeting  attended and the chairman of
each  committee  also  receives  $1,000 per year.  Trustees who are directors or
employees of the Adviser or an affiliated  company  receive no  compensation  or
expense reimbursement from the Fund.

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.

                                       11



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

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the fiscal year ended  December  31,  2006,  other than  short-term  securities,
aggregated $586,744,275 and $844,487,503, respectively.

6. TRANSACTIONS WITH AFFILIATES. During the fiscal year ended December 31, 2006,
the  Fund  paid   brokerage   commissions  of  $42,561  to  Gabelli  &  Company.
Additionally,  Gabelli & Company  informed  the Fund that it received  $495 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 fiscal year
ended  December  31,  2006,  the Fund paid or accrued  $45,000 to the Adviser in
connection with the cost of computing the Fund's NAV.

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.  This amount, if any, would be shown as "interest expense"
in the Statement of Operations.  At December 31, 2006,  there were no borrowings
outstanding from the line of credit.

The average amount of borrowings  outstanding from the line of credit within the
fiscal year ended December 31, 2006 was $31,534 with a weighted average interest
rate of 6.03%.  The maximum  amount  borrowed at any time during the fiscal year
ended December 31, 2006 was $5,772,000.

8. SHARES OF  BENEFICIAL  INTEREST.  The Fund  currently  offers four classes of
shares - Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares.
Effective  February 15, 2007, Class AAA Shares are offered only to investors who
are  shareholders  prior  to that  date in one or more of the  registered  funds
distributed  by  Gabelli  &  Company.  Class AAA  Shares  are  offered  to these
investors only through selected  broker/dealers  or the transfer agent 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 1.00% 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.

The Fund imposes 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 on or before
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 fiscal
years ended  December  31,  2006 and  December  31, 2005  amounted to $6,591 and
$25,950, respectively.

                                       12


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


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.

Transactions in shares of beneficial interest were as follows:


                                                 YEAR ENDED                        YEAR ENDED
                                              DECEMBER 31, 2006                 DECEMBER 31, 2005
                                       ----------------------------       ----------------------------
                                          SHARES          AMOUNT            SHARES          AMOUNT
                                       -----------    -------------       -----------    -------------
                                                  CLASS AAA                         CLASS AAA
                                       ----------------------------       ----------------------------
                                                                             
Shares sold ...........................  2,450,572    $  71,744,626         4,243,927    $ 113,064,508
Shares redeemed .......................(10,762,763)    (315,897,156)      (20,096,781)    (537,753,096)
                                       -----------    -------------       -----------    -------------
  Net decrease ........................ (8,312,191)   $(244,152,530)      (15,852,854)   $(424,688,588)
                                       ===========    =============       ===========    =============

                                                   CLASS A                           CLASS A
                                       ----------------------------       ----------------------------
Shares sold ...........................      1,400    $      40,639             7,311    $     208,331
Shares redeemed .......................     (1,881)         (54,763)             (594)         (15,984)
                                       -----------    -------------       -----------    -------------
  Net increase (decrease) .............       (481)   $     (14,124)            6,717    $     192,347
                                       ===========    =============       ===========    =============


                                                   CLASS C                           CLASS C
                                       ----------------------------       ----------------------------
Shares sold ...........................      2,965    $      85,939            14,494    $     373,629
Shares redeemed .......................     (9,040)        (262,541)           (3,750)        (101,035)
                                       -----------    -------------       -----------    -------------
  Net increase (decrease) .............     (6,075)   $    (176,602)           10,744    $     272,594
                                       ===========    =============       ===========    =============


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  received  subpoenas from the
Attorney General of the State of New York and the SEC requesting  information on
mutual fund share  trading  practices  involving  certain  funds  managed by the
Adviser.  GAMCO  Investors,   Inc.  ("GAMCO"),  the  Adviser's  parent  company,
responded to these  requests for documents and  testimony.  In June 2006,  GAMCO
began discussions with the SEC regarding a possible resolution of their inquiry.
In February  2007,  the Adviser made an offer of  settlement to the staff of the
SEC for  communication  to the Commission for its  consideration to resolve this
matter.  This offer of settlement is subject to agreement regarding the specific
language of the SEC's administrative order and other settlement documents.  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.

                                       13


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

Selected data for a share of beneficial  interest  outstanding  throughout  each
period:


                           INCOME FROM INVESTMENT OPERATIONS
                         --------------------------------------
                                          Net
              Net Asset               Realized and      Total
  Period        Value,       Net       Unrealized       from
   Ended      Beginning  Investment  Gain/(Loss) on  Investment   Redemption
December 31   of Period    Loss(a)    Investments    Operations     Fees(a)
- -----------   ---------  ----------  -------------   ----------    ---------
                                                    
CLASS AAA
   2006        $28.81     $(0.05)       $ 1.86         $ 1.81      $0.00(b)
   2005         26.12      (0.13)         2.82           2.69       0.00(b)
   2004         24.95      (0.11)         1.28           1.17       0.00(b)
   2003         18.99      (0.14)         6.10           5.96         --
   2002         28.68      (0.17)        (9.52)         (9.69)        --
CLASS A
   2006        $28.82     $(0.06)       $ 1.87         $ 1.81      $0.00(b)
   2005         26.13      (0.12)         2.81           2.69       0.00(b)
   2004(c)      24.95      (0.02)         1.20           1.18       0.00(b)
CLASS B
   2006        $28.38     $(0.27)       $ 1.82         $ 1.55      $0.00(b)
   2005         25.93      (0.32)         2.77           2.45       0.00(b)
   2004(c)      24.95      (0.28)         1.26           0.98       0.00(b)
CLASS C
   2006        $28.38     $(0.27)       $ 1.82         $ 1.55      $0.00(b)
   2005         25.93      (0.32)         2.77           2.45       0.00(b)
   2004(c)      24.95      (0.21)         1.19           0.98       0.00(b)




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

              Net Asset           Net Assets
  Period        Value,               End of       Net                      Portfolio
   Ended        End of     Total     Period    Investment    Operating      Turnover
December 31     Period    Return+  (in 000's)    Income       Expenses        Rate
- -----------     -------   -------  ----------  ----------   -----------    ----------
                                                            
CLASS AAA
   2006         $30.62      6.3%   $  956,811    (0.19)%       1.44%          57%
   2005          28.81     10.3     1,139,640    (0.48)        1.49           39
   2004          26.12      4.7     1,447,655    (0.46)        1.53           31
   2003          24.95     31.4     1,881,457    (0.60)        1.47           42
   2002          18.99    (33.8)    1,675,816    (0.68)        1.43           30
CLASS A
   2006         $30.63      6.3%   $      276    (0.19)%       1.44%          57%
   2005          28.82     10.3           274    (0.43)        1.47           39
   2004(c)       26.13      4.7            73    (0.09)        1.60           31
CLASS B
   2006         $29.93      5.5%   $      289    (0.94)%       2.19%          57%
   2005          28.38      9.5           274    (1.22)        2.24           39
   2004(c)       25.93      3.9           250    (1.12)        2.30           31
CLASS C
   2006         $29.93      5.5%   $      401    (0.95)%       2.19%          57%
   2005          28.38      9.5           553    (1.21)        2.23           39
   2004(c)       25.93      3.9           226    (0.88)        2.37           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  distributions  and does not reflect  applicable
    sales charges.
(a) Per share amounts have been calculated using the average shares  outstanding
    method.
(b) Amount represents less than $0.005 per share.
(c) Class A, Class B, and Class C Shares were initially  offered on December 31,
    2003.


                 See accompanying notes to financial statements.

                                       14


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


To the Board of Trustees and Shareholders of
The GAMCO Growth Fund:

In our opinion, the accompanying statement of assets and liabilities,  including
the schedule of  investments,  and the related  statements of operations  and of
changes  in net assets  and the  financial  highlights  present  fairly,  in all
material  respects,  the financial  position of The GAMCO Growth Fund (hereafter
referred to as the "Fund") at December 31, 2006,  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  periods
presented,  in conformity with accounting  principles  generally accepted in the
United States of America.  These financial  statements and financial  highlights
(hereafter referred to as "financial  statements") are the responsibility of the
Fund's  management.  Our  responsibility  is to  express  an  opinion  on  these
financial  statements  based on our  audits.  We  conducted  our audits of these
financial  statements  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 are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements,  assessing the accounting  principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe  that our  audits,  which  included  confirmation  of  securities  at
December 31, 2006 by  correspondence  with the  custodian,  provide a reasonable
basis for our opinion.


PricewaterhouseCoopers LLP
New York, New York
February 28, 2007

                                       15


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


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



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

MARIO J. GABELLI       Since 1992          24        Chairman of the Board and Chief Executive     Director of Morgan
Trustee                                              Officer of GAMCO Investors, Inc. and          Group Holdings, Inc.
Age: 64                                              Chief Investment Officer - Value Portfolios   (transportation services);
                                                     of Gabelli Funds, LLC and GAMCO Asset         Chairman of the Board of
                                                     Management Inc.; Director/Trustee or Chief    Lynch Interactive
                                                     Investment Officer of other registered        Corporation (multimedia and
                                                     investment companies in the Gabelli Funds     communication services
                                                     complex; Chairman and Chief Executive         company)
                                                     Officer of GGCP, Inc.

JOHN D. GABELLI        Since 1995          10        Senior Vice President of Gabelli &            Director of GAMCO
Trustee                                              Company, Inc.                                 Investors, Inc.
Age: 62

ANTHONY TORNA, SR.     Since 1987           1        Registered Representative, Maxim Group LLC        --
Trustee                                              from 2002; Investec Ernst & Company,
Age: 80                                              2001-2002; Herzog, Heine & Geduld, Inc.
                                                     through 2000

INDEPENDENT TRUSTEES 5:
- ----------------------
ANTHONY J. COLAVITA    Since 1989          34        Partner in the law firm of                        --
Trustee                                              Anthony J. Colavita, P.C.
Age: 71

JAMES P. CONN          Since 1992          15        Former Managing Director and Chief            Director of First Republic
Trustee                                              Investment Officer of Financial Security      Bank (banking)
Age: 68                                              Assurance Holdings Ltd. (insurance
                                                     holding company) (1992-1998)

DUGALD A. FLETCHER      1989-1996           2        President, Fletcher & Company, Inc.           Director of Harris and
Trustee               2000-present                                                                 Harris Group, Inc.
Age: 77                                                                                            (venture capital)

ROBERT J. MORRISSEY    Since 2001           6        Partner in the law firm of Morrissey,             --
Trustee                                              Hawkins & Lynch
Age: 67

ANTHONY R. PUSTORINO   Since 1987          14        Certified Public Accountant; Professor        Director of The LGL Group, Inc.
Trustee                                              Emeritus, Pace University                     (diversified manufacturing)
Age: 81

ANTHONIE C. VAN EKRIS   1987-1989          17        Chairman of BALMAC International, Inc.            --
Trustee               1992-present                   (commodities and futures trading)
Age: 72

SALVATORE J. ZIZZA      1987-1996          25        Chairman of Hallmark Electrical               Director of Hollis-Eden
Trustee               2000-present                   Supplies Corp. (distribution of               Pharmaceuticals (biotechnology);
Age: 61                                              electrical supplies)                          Director of Earl Scheib, Inc.
                                                                                                   (automotive services)


                                       16



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



                       TERM OF
NAME, POSITION(S)    OFFICE AND
    ADDRESS 1         LENGTH OF                    PRINCIPAL OCCUPATION(S)
     AND AGE        TIME SERVED 2                  DURING PAST FIVE YEARS
- ----------------    -------------                  ----------------------
OFFICERS:
- --------
                                     
BRUCE N. ALPERT       Since 1994           Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC
President                                  since 1988 and an officer of all of the registered investment companies in
Age: 55                                    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 Investors, Inc.
Secretary                                  since 1999 and  GAMCO Asset Management Inc. since 1993; Secretary
Age: 43                                    of all of the registered investment companies in the Gabelli Funds complex

AGNES MULLADY         Since 2006           Treasurer of all of the registered investment companies in the Gabelli Funds
Treasurer                                  complex; Senior Vice President of U.S. Trust Company, N.A. and Treasurer
Age: 48                                    and Chief Financial Officer of Excelsior Funds from 2004 through 2005;
                                           Chief Financial Officer of AMIC Distribution Partners from 2002 through 2004;
                                           Controller of Reserve Management Corporation and Reserve Partners, Inc. and
                                           Treasurer of Reserve Funds from 2000 through 2002

PETER D. GOLDSTEIN    Since 2004           Director of Regulatory Affairs at GAMCO Investors, Inc. since 2004;
Chief Compliance Officer                   Chief Compliance Officer of all of the registered investment companies
Age: 53                                    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 Trustee 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  Trustee  and until the
    election and qualification of his or her successor,  if any, elected at such
    meeting,  or (ii) the date a Trustee  resigns  or  retires,  or a Trustee is
    removed by the Board of Trustees or  shareholders,  in  accordance  with the
    Fund's By-Laws and  Declaration of Trust.  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.
  3 "Interested person" of the Fund as defined in the 1940 Act. Messrs.  Gabelli
    are each considered an "interested person" because of their affiliation with
    Gabelli Funds, LLC which acts as the Fund's investment adviser. Mr. Torna is
    considered an  interested  person  because he is a registered  broker with a
    firm  to  which  the  Fund  Complex  (but  not  the  Fund)  pays   brokerage
    commissions. 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, as amended (i.e.  public
    companies) or other investment companies registered under the 1940 Act.
  5 Trustees   who  are  not interested  persons  are  considered  "Independent"
    Trustees.

                                       17

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

     WHO ARE WE?
     The  Gabelli/GAMCO and Westwood 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
     SHAREHOLDER?
     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.  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  at the time of investment of $2 billion  or less)  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 generally less than $3.0  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)                                            TEAM MANAGED

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. (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  debt instruments. (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  FUNDS MAY  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 CAREFULLY
  CONSIDER THE INVESTMENT OBJECTIVES, RISKS, CHARGES, AND EXPENSES OF THE FUND
           BEFORE INVESTING. THE PROSPECTUS CONTAINS MORE INFORMATION
   ABOUT THIS AND OTHER MATTERS AND SHOULD BE READ CAREFULLY BEFORE INVESTING.


                              THE GAMCO 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 per share available daily by calling
                           800-GABELLI after 6:00 P.M.

                                BOARD OF TRUSTEES
Mario J. Gabelli, CFA                           Robert J. Morrissey
CHAIRMAN AND CHIEF                              ATTORNEY-AT-LAW
EXECUTIVE OFFICER                               MORRISSEY, HAWKINS & LYNCH
GAMCO INVESTORS, INC.

Anthony J. Colavita                             Anthony R. Pustorino
ATTORNEY-AT-LAW                                 CERTIFIED PUBLIC ACCOUNTANT,
ANTHONY J. COLAVITA, P.C.                       PROFESSOR EMERITUS
                                                PACE UNIVERSITY

James P. Conn                                   Anthony Torna
FORMER CHIEF INVESTMENT OFFICER                 MAXIM GROUP LLC
FINANCIAL SECURITY ASSURANCE
HOLDINGS LTD.

Dugald A. Fletcher                              Anthonie C. van Ekris
PRESIDENT                                       CHAIRMAN
FLETCHER & COMPANY, INC.                        BALMAC INTERNATIONAL, INC.

John D. Gabelli                                 Salvatore J. Zizza
SENIOR VICE PRESIDENT                           CHAIRMAN, HALLMARK ELECTRICAL
GABELLI & COMPANY, INC.                         SUPPLIES CORP.

                         OFFICERS AND PORTFOLIO MANAGER
Bruce N. Alpert                                 Howard F. Ward, CFA
PRESIDENT                                       PORTFOLIO MANAGER

James E. McKee                                  Peter D. Goldstein
SECRETARY                                       CHIEF COMPLIANCE OFFICER

Agnes Mullady
TREASURER

                                   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  Growth  Fund.  It is  not  authorized  for  distribution  to  prospective
investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------

GAB406Q406SR

                                                                           GAMCO

                                           THE
                                           GAMCO
                                           GROWTH
                                           FUND






                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2006




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
Trustees has  determined  that Anthony R.  Pustorino 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
         $42,829 for 2005 and $43,200 for 2006.


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 for 2005 and $0 for 2006.

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 $2,880 for 2005 and $3,100
         for 2006.  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
         for 2005 and $0 for 2006.

  (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
         registered  public  accounting  firm to the  registrant  and  (ii)  all
         permissible  non-audit  services  to be  provided  by  the  independent
         registered public  accounting firm 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  registered public  accounting  firm's  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
         permissible non-audit services were not recognized by the registrant at
         the time of the  engagement  to be  non-audit  services;  and (ii) 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)  Not applicable

                           (c)  100%

                           (d)  Not applicable

     (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 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 $0 for 2005 and $0 for 2006.

     (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  Trustees,  where those
changes were  implemented  after the  registrant  last  provided  disclosure  in
response to the  requirements  of Item  407(c)(2)(iv)  of Regulation S-K (17 CFR
229.407) (as required by Item  22(b)(15) 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)      The GAMCO Growth Fund
                 ---------------------------------------------------------------

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


Date              03/01/2007
    ----------------------------------------------------------------------------


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


Date              03/01/2007
    ----------------------------------------------------------------------------


By (Signature and Title)*  /s/ Agnes Mullady
                         -------------------------------------------------------
                           Agnes Mullady,
                           Principal Financial Officer & Treasurer


Date              03/01/2007
    ----------------------------------------------------------------------------



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