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 811-07326
                                                     ---------

                          Gabelli Investor Funds, Inc.
                  -------------------------------------------
               (Exact name of registrant as specified in charter)

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

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


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

                      Date of fiscal year end: December 31
                                              -------------

                   Date of reporting period: December 31, 2005
                                             -----------------


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

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


ITEM 1. REPORTS TO STOCKHOLDERS.

The Report to Shareholders is attached herewith.


                              THE GABELLI ABC FUND
                                  ANNUAL REPORT
                               DECEMBER 31, 2005



TO OUR SHAREHOLDERS,

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

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

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

PERFORMANCE DISCUSSION

      The Gabelli ABC Fund gained 1.38% during the fourth  quarter and 4.98% for
full year 2005. We note that 2005 was the 12th consecutive  calendar year during
which the Fund had positive performance.

      Merger and acquisition  (M&A) activity in the U.S.  exceeded $1.1 trillion
during  2005,  a 33%  increase  from  2004's  announced  total of $849  billion.
Announced  worldwide  M&A volume was over $2.7  trillion,  making 2005 the third
best year ever for M&A and the best year since  2000.  The  premium  buyers were
willing to pay for  acquisitions  hit a record low of 20 percent compared to the
peak of 29 percent reached in 2000.

      During  the  year,  the U.S.  accounted  for  approximately  40% of global
transactions. Private equity acquisitions of U.S. companies rose to record level
in 2005.  Sectors that led in M&A activity in the U.S. in the past twelve months
were Energy and Power, Financials, and Media and Entertainment.

      The three largest deals of the year in which the Fund participated were:

      PROCTER & GAMBLE (PG - $57.88 - NYSE) $57 billion acquisition of Gillette.

      BANK OF AMERICA (BAC - $46.15 - NYSE) announcement on June 30th to acquire
MBNA Corp for $35.8 billion.

      GAS NATURAL SDG, S.A.  (GAS.MC - [EURO] 23.66 - MADRID STOCK  EXCHANGE) of
Spain announced  on September 5th that it intends to acquire 100% of Endesa S.A.
for approximately $51.4 billion.


      The Fund invests in "event" driven  situations such as announced  mergers,
acquisitions,  and  reorganizations.  When a company  agrees to be  acquired  by
another  company,  its stock price often  quickly rises to just below the stated
acquisition price. If the Adviser,  through extensive research,  determines that
the  acquisition  is  likely  to  be  consummated  on  schedule  at  the  stated
acquisition price, then the Fund may purchase the selling company's  securities,
offering  the  Fund  the  possibility  of  generous  returns  relative  to  cash
equivalents  with a limited  risk of  capital.  Among  the  deals  that the Fund
participated in during the year were Alamosa Holdings Inc., Anteon International
Corp.,  Chiron Corp.,  Dofasco Inc.,  Georgia-Pacific,  Guidant Corp., La Quinta
Corp.,   Endesa  SA,  Reebok   International   Ltd.,  E-Loan  Inc.,   Imagistics
International Inc.,  PalmSource Inc., Vicuron  Pharmaceuticals  Inc., Ameritrade
Holding Corp.,  Kaman Corp.,  Cuno Inc.,  Overnite  Corp.,  Retek Inc.,  Accredo
Health Inc., United Defense Industries Inc., and Insurance Auto Auctions.

      Some of the best performers in 2005 from the long-term holdings in the ABC
Fund include  Kaman Corp.  +55.7%,  Argonaut  Group Inc.  +55.09%,  Mirant Corp.
+48.1%,  Gold Fields Ltd. +41.3%,  Revlon Inc. +34.8%,  and Gold Banc Corp. Inc.
+24.6%.  Positions  that  the  Fund  had at the  beginning  of  2005  that  hurt
performance  during the year were Dana Corp.  -58.6%,  Packaging  Dynamics Corp.
- -22.2%,  Las Vegas Sands Corp. -17.8%,  Grupo Continental SA -17.5%,  Monolithic
System Technology Inc. -11.7%,  Provide Commerce Inc. -10.9%,  and Guidant Corp.
- -10.2. The Fund's cash and cash equivalents at the end of 2005 was slightly over
18% or  approximately  46  percentage  points  less than the level at the end of
2004.  Higher  short-term  interest rates from our short-term  U.S.Treasury Bill
investments during the year also bolstered our return.

                                              Sincerely yours,

                                              /s/ Bruce N. Alpert

                                              Bruce N. Alpert
February 13, 2006

                                       2



                                [GRAPHIC OMITTED]
                                PLOT POINTS FOLLOW:

 COMPARISON OF CHANGE IN VALUE OF A $50,000 INVESTMENT IN THE GABELLI ABC FUND,
       THE LIPPER U.S. TREASURY MONEY MARKET AVERAGE AND THE S&P 500 INDEX

             Gabelli ABC        Lipper U.S. Treasury             S&P 500
                    Fund        Money Market Average               Index
5/14/93         $ 50,000                     $50,000            $ 50,000
12/31/93          54,550                      50,815              54,045
12/31/94          57,021                      52,649              54,753
12/31/95          63,396                      55,456              75,302
12/31/96          68,335                      58,090              92,584
12/31/97          77,047                      60,692             123,460
12/31/98          85,630                      63,527             158,770
12/31/99          93,337                      66,233             192,159
12/31/00         103,464                      69,902             174,673
12/31/01         108,182                      72,251             153,904
12/31/02         109,123                      72,995             119,907
12/31/03         114,514                      73,302             154,284
12/31/04         116,724                      73,734             171,054
12/31/05         122,537                      75,445             179,453

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


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


              AVERAGE ANNUAL RETURNS THROUGH DECEMBER 31, 2005 (A)
              ----------------------------------------------------
                                                                                                          Since
                                                                                                        Inception
                                                  QUARTER    1 YEAR    3 YEAR      5 YEAR     10 YEAR   (5/14/93)
- -----------------------------------------------------------------------------------------------------------------
                                                                                       
 GABELLI ABC FUND ..............................  1.38%      4.98%      3.94%      3.44%      6.81%      7.35%

 S&P 500 Index .................................  2.08       4.91      14.38       0.54       9.07      10.64
 Lipper U.S. Treasury Money Market Avg. ........  0.77       2.32       1.11       1.54       3.20       3.37(b)

(a) RETURNS  REPRESENT PAST  PERFORMANCE  AND DO NOT GUARANTEE  FUTURE  RESULTS.
    TOTAL RETURNS AND AVERAGE ANNUAL RETURNS  REFLECT CHANGES IN SHARE PRICE AND
    REINVESTMENT  OF DIVIDENDS  AND CAPITAL GAINS  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.  RETURNS  WOULD  HAVE  BEEN  LOWER IF  CERTAIN
    EXPENSES  OF THE FUND HAD NOT BEEN  WAIVED OR  REIMBURSED  SINCE APRIL 2002.
    VISIT  WWW.GABELLI.COM  FOR  PERFORMANCE  INFORMATION  AS OF THE MOST RECENT
    MONTH-END.  INVESTORS  SHOULD  CONSIDER THE  INVESTMENT  OBJECTIVES,  RISKS,
    CHARGES, AND EXPENSES OF THE FUND CAREFULLY BEFORE INVESTING. THE PROSPECTUS
    CONTAINS  MORE  INFORMATION  ABOUT THIS AND OTHER MATTERS AND SHOULD BE READ
    CAREFULLY BEFORE INVESTING.  THE S&P 500 INDEX IS AN UNMANAGED  INDICATOR OF
    STOCK  MARKET  PERFORMANCE,  WHILE THE LIPPER  AVERAGE  REFLECTS THE AVERAGE
    PERFORMANCE OF MUTUAL FUNDS CLASSIFIED IN THIS PARTICULAR CATEGORY.
(b) FROM APRIL 30, 1993, THE DATE CLOSEST TO THE FUND'S INCEPTION FOR WHICH DATA
    IS AVAILABLE.
- --------------------------------------------------------------------------------

                                       3


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


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

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

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

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

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

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

                    Beginning       Ending      Annualized    Expenses
                  Account Value  Account Value    Expense    Paid During
                    07/01/05       12/31/05        Ratio       Period*
- --------------------------------------------------------------------------------
THE GABELLI ABC FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Gabelli ABC Fund    $1,000.00     $1,032.00        0.62%       $3.18

HYPOTHETICAL 5% RETURN
Gabelli ABC Fund    $1,000.00     $1,022.08        0.62%       $3.16

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

                                       4


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

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

THE GABELLI ABC FUND

Health Care ...................................  14.4%
Food and Beverage .............................  12.8%
U.S. Government Obligations ...................  11.4%
Computer Software and Services ................   9.8%
Wireless Communications .......................   9.4%
Telecommunications ............................   9.1%
Energy and Utilities ..........................   4.1%
Hotels and Gaming .............................   4.1%
Real Estate ...................................   3.6%
Metals and Mining .............................   2.3%
Financial Services ............................   2.2%
Automotive: Parts and Accessories .............   1.3%
Business Services .............................   0.9%
Consumer Products .............................   0.9%
Diversified Industrial ........................   0.8%
Broadcasting ..................................   0.7%
Cable and Satellite ...........................   0.6%
Consumer Services .............................   0.5%
Publishing ....................................   0.5%
Electronics ...................................   0.4%
Transportation ................................   0.4%
Equipment and Supplies ........................   0.3%
Retail ........................................   0.2%
Aviation: Parts and Services ..................   0.1%
Entertainment .................................   0.1%
Computer Hardware .............................   0.0%
Communications Equipment ......................   0.0%
Home Furnishings ..............................   0.0%
Other Assets and Liabilities - (Net) ..........   9.1%
                                               --------
                                                100.0%
                                               ========


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


PROXY VOTING

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

                                       5


THE GABELLI ABC FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2005
================================================================================

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              COMMON STOCKS -- 78.4%
              AUTOMOTIVE: PARTS AND ACCESSORIES -- 1.3%
     26,537   BERU AG ................... $  2,328,889   $  2,230,607
     15,000   Dana Corp. ................      191,574        107,700
      5,000   Federal-Mogul Corp.+ ......       14,938          1,800
                                          ------------   ------------
                                             2,535,401      2,340,107
                                          ------------   ------------
              AVIATION: PARTS AND SERVICES -- 0.1%
        500   Aviall Inc.+ ..............        4,419         14,400
     14,000   Fairchild Corp.,
                Cl. A+ ..................       83,210         35,700
      8,000   Kaman Corp. ...............      140,332        157,520
                                          ------------   ------------
                                               227,961        207,620
                                          ------------   ------------
              BROADCASTING -- 0.7%
     10,000   Cogeco Inc. ...............      194,809        206,461
     53,500   Crown Media Holdings
                Inc., Cl. A+ ............      566,521        490,595
     10,000   Liberty Corp. .............      457,248        468,100
        500   Salem Communications
                Corp., Cl. A+ ...........        3,895          8,745
                                          ------------   ------------
                                             1,222,473      1,173,901
                                          ------------   ------------
              BUSINESS SERVICES -- 0.0%
      1,000   CCC Information Services
                Group Inc.+ .............       26,209         26,220
                                          ------------   ------------
              CABLE AND SATELLITE -- 0.6%
     30,000   Cablevision Systems
                Corp., Cl. A+ ...........      721,067        704,100
     12,000   PanAmSat Holding
                Corp. ...................      288,600        294,000
                                          ------------   ------------
                                             1,009,667        998,100
                                          ------------   ------------
              COMPUTER HARDWARE -- 0.0%
      1,000   Maxtor Corp.+ .............        6,910          6,940
                                          ------------   ------------
              COMPUTER SOFTWARE AND SERVICES -- 9.8%
     31,000   Anteon International
                Corp.+ ..................    1,677,741      1,684,850
    300,000   Micromuse Inc.+ ...........    2,969,700      2,967,000
      1,000   NEON Systems Inc.+ ........        6,130          6,170
  1,200,000   Siebel Systems Inc. .......   12,514,981     12,696,000
  1,215,000   StorageNetworks Inc.
                Escrow+ (a) .............            0         36,450
                                          ------------   ------------
                                            17,168,552     17,390,470
                                          ------------   ------------
              CONSUMER PRODUCTS -- 0.9%
     60,000   Levcor International
                Inc.+ ...................      140,640         45,000
      3,000   Maytag Corp. ..............       56,249         56,460
     33,000   Packaging Dynamics
                Corp. ...................      210,615        368,610
     15,000   Reebok International
                Ltd. ....................      851,878        873,450
     61,035   Revlon Inc., Cl. A+ .......      120,178        189,208
        270   Vector Group Ltd. .........        4,270          4,906
                                          ------------   ------------
                                             1,383,830      1,537,634
                                          ------------   ------------

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              CONSUMER SERVICES -- 0.5%
     14,000   IAC/InterActiveCorp+ ...... $    342,813   $    396,340
     15,000   Provide Commerce
                Inc.+ ...................      500,091        496,650
                                          ------------   ------------
                                               842,904        892,990
                                          ------------   ------------
              DIVERSIFIED INDUSTRIAL -- 0.7%
      6,000   Ampco-Pittsburgh
                Corp. ...................       69,606         87,060
     55,120   Harbor Global Co.
                Ltd.+ ...................      267,922        496,080
      3,000   Honeywell
                International Inc. ......      109,642        111,750
      3,000   Katy Industries
                Inc.+ ...................       17,440          9,300
     50,000   WHX Corp.+ ................      782,112        507,500
                                          ------------   ------------
                                             1,246,722      1,211,690
                                          ------------   ------------
              ELECTRONICS -- 0.4%
      4,000   Integrated Device
                Technology Inc.+ ........       44,659         52,720
        500   Leica Geosystems AG .......      220,139        218,789
     80,000   Monolithic System
                Technology Inc.+ ........      393,644        440,000
      1,140   Safran SA .................       21,363         27,263
                                          ------------   ------------
                                               679,805        738,772
                                          ------------   ------------
              ENERGY AND UTILITIES -- 4.0%
     10,000   Burlington Resources
                Inc. ....................      860,010        862,000
    165,000   Endesa SA .................    4,202,008      4,340,512
        664   Kerr-McGee Corp. ..........       32,506         60,331
     23,000   Northeast Utilities .......      412,975        452,870
        715   Petrohawk Energy
                Corp.+ ..................        7,894          9,452
     25,000   Progress Energy
                Inc., CVO+ ..............       13,000          1,812
     44,000   Suez SA ...................    1,487,811      1,368,961
     44,000   Suez SA, Strips+ ..........            0            521
      1,000   Vintage Petroleum
                Inc. ....................       49,160         53,330
                                          ------------   ------------
                                             7,065,364      7,149,789
                                          ------------   ------------
              ENTERTAINMENT -- 0.1%
      1,001   Chestnut Hill
                Ventures+ (a) ...........        3,750         21,501
      5,000   Dave & Buster's
                Inc.+ ...................       88,350         88,050
      1,000   Discovery Holding
                Co., Cl. A+ .............       12,527         15,150
     10,000   Liberty Media Corp.,
                Cl. A+ ..................       76,951         78,700
                                          ------------   ------------
                                               181,578        203,401
                                          ------------   ------------
              EQUIPMENT AND SUPPLIES -- 0.3%
      1,000   Ault Inc.+ ................        2,863          2,860
     25,000   Baldwin Technology
                Co. Inc., Cl. A+ ........       59,500        101,250
      4,500   HeidelbergCement AG .......      327,161        400,949
                                          ------------   ------------
                                               389,524        505,059
                                          ------------   ------------
              FINANCIAL SERVICES -- 2.2%
      3,000   Amvescap plc, ADR .........       43,670         46,170
     16,900   Argonaut Group Inc.+ ......      384,000        553,813
     22,000   Banca Antonveneta
                SpA .....................      694,349        684,741
     20,000   Collegiate Funding
                Services Inc.+ ..........      393,300        395,000

                See accompanying notes to financial statements.

                                       6


THE GABELLI ABC FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              COMMON STOCKS (CONTINUED)
              FINANCIAL SERVICES (CONTINUED)
      1,000   Cornerstone
                Bancorp Inc. ............ $     33,900   $     35,200
     16,000   Fifth Third Bancorp .......      751,840        603,520
      1,000   First Data Corp. ..........       28,875         43,010
     25,000   Gold Banc Corp. Inc. ......      375,646        455,500
      1,500   Leucadia
                National Corp. ..........       30,175         71,190
     36,000   MBNA Corp. ................      934,760        977,400
                                          ------------   ------------
                                             3,670,515      3,865,544
                                          ------------   ------------
              FOOD AND BEVERAGE -- 12.8%
     12,100   Cruzan International
                Inc.+ ...................      340,571        338,921
     20,000   Denny's Corp.+ ............       49,969         80,600
    260,000   Dreyer's Grand Ice
                Cream Holdings Inc.,
                Cl. A ...................   20,321,677     21,548,800
        500   Genesee Corp.,
                Cl. A+ ..................          750            812
     12,200   Genesee Corp.,
                Cl. B+ ..................        4,466         20,740
    142,100   Grupo Continental
                SA ......................      218,331        235,887
     10,000   Pernod Ricard
                SA, ADR .................      417,494        434,665
      1,000   Vincor International
                Inc.+ ...................       26,291         26,642
                                          ------------   ------------
                                            21,379,549     22,687,067
                                          ------------   ------------
              HEALTH CARE -- 14.4%
    120,000   Animas Corp.+ .............    2,885,600      2,898,000
    182,500   Beverly
                Enterprises Inc.+ .......    2,326,250      2,129,775
    250,000   Chiron Corp.+ .............   11,067,519     11,115,000
     45,000   Guidant Corp. .............    3,046,113      2,913,750
     70,000   IDX Systems Corp.+ ........    3,024,057      3,074,400
     25,000   IMS Health Inc. ...........      641,065        623,000
      1,000   INAMED Corp.+ .............       69,444         87,680
      1,000   OSI Pharmaceuticals
                Inc.+ ...................       25,690         28,040
     50,000   Renal Care Group
                Inc.+ ...................    2,308,185      2,365,500
     10,000   Serono SA, ADR ............      182,570        198,600
                                          ------------   ------------
                                            25,576,493     25,433,745
                                          ------------   ------------
              HOTELS AND GAMING -- 4.1%
     22,000   GTECH Holdings Corp. ......      724,970        698,280
    530,000   La Quinta Corp.+ ..........    5,812,625      5,904,200
     17,000   Las Vegas Sands
                Corp.+ ..................      626,367        670,990
                                          ------------   ------------
                                             7,163,962      7,273,470
                                          ------------   ------------
              METALS AND MINING -- 2.3%
     39,000   Alcan Inc. ................    1,520,654      1,597,050
      7,500   Dofasco Inc. ..............      387,655        419,244
     40,000   Falconbridge Ltd. .........      963,328      1,187,148
     20,000   Gold Fields Ltd.,
                ADR .....................      255,907        352,600
     12,500   Novelis Inc. ..............      288,976        261,125
     10,000   Placer Dome Inc. ..........      207,279        229,300
     10,000   Royal Oak
                Mines Inc.+ .............       11,858             23
                                          ------------   ------------
                                             3,635,657      4,046,490
                                          ------------   ------------

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              PUBLISHING -- 0.5%
     25,000   Dow Jones & Co. Inc. ...... $    993,336   $    887,250
                                          ------------   ------------
              REAL ESTATE -- 3.6%
     10,000   Amli Residential
                Properties Trust ........      376,591        380,500
     50,000   Arden Realty Inc. .........    2,261,750      2,241,500
     20,000   CenterPoint
                Properties Trust ........      991,877        989,600
      5,000   CRIIMI MAE Inc.+ ..........       97,570         99,000
     72,000   Griffin Land &
                Nurseries Inc.+ .........    1,662,413      1,879,560
        316   HomeFed Corp. .............          566         21,172
        500   ProLogis ..................       11,325         23,360
     20,000   Town & Country Trust ......      676,480        676,200
                                          ------------   ------------
                                             6,078,572      6,310,892
                                          ------------   ------------
              RETAIL -- 0.2%
     20,000   Albertson's Inc. ..........      448,536        427,000
      1,000   Hudson's Bay Co. ..........       13,134         12,749
      1,000   Saks Inc.+ ................       17,450         16,860
                                          ------------   ------------
                                               479,120        456,609
                                          ------------   ------------
              TELECOMMUNICATIONS -- 9.1%
     20,000   Corning Inc.+ .............      264,342        393,200
     31,900   MCI Inc. ..................      760,002        629,387
    210,000   Scientific-
                Atlanta Inc. ............    8,897,201      9,044,700
    100,000   TDC A/S ...................    5,802,070      5,990,162
      3,000   Telegroup Inc.+ ...........           31              1
      1,000   Telindus Group NV+ ........       19,395         20,008
                                          ------------   ------------
                                            15,743,041     16,077,458
                                          ------------   ------------
              TRANSPORTATION -- 0.4%
     80,000   Peninsular & Oriental
                Steam Navigation Co. ....      605,141        641,398
                                          ------------   ------------
              WIRELESS COMMUNICATIONS -- 9.4%
    450,000   Alamosa Holdings
                Inc.+ ...................    8,310,210      8,374,500
        500   American Tower Corp.,
                Cl. A+ ..................        7,707         13,550
     14,000   Metricom Inc.+ ............        1,680             28
    200,000   Nextel Partners Inc.,
                Cl. A+ ..................    5,572,220      5,588,000
    650,000   O2 plc ....................    2,304,041      2,211,474
     10,000   Telesystem International
                Wireless Inc. ...........            0             80
     10,000   United States
                Cellular Corp.+ .........      466,745        494,000
     50,000   Winstar Communications
                Inc.+ (a) ...............        2,125             50
                                          ------------   ------------
                                            16,664,728     16,681,682
                                          ------------   ------------
              TOTAL COMMON STOCKS .......  135,977,014    138,744,298
                                          ------------   ------------

                See accompanying notes to financial statements.

                                       7


THE GABELLI ABC FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 2005
================================================================================

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              PREFERRED STOCKS -- 0.0%
              COMMUNICATIONS EQUIPMENT -- 0.0%
              RSL Communications Ltd.,
      2,000     7.500% Cv. Pfd.,
                Ser. A+ (a)(b) .......... $        185   $          0
      1,000     7.500% Cv.
                Pfd.+ (a)(b) ............           93              0
                                          ------------   ------------
                                                   278              0
                                          ------------   ------------
              HOME FURNISHINGS -- 0.0%
      8,000   O'Sullivan Industries
                Holdings Inc.,
                12.000% Pfd.+ ...........        4,750              2
                                          ------------   ------------
              TOTAL PREFERRED
                STOCKS ..................        5,028              2
                                          ------------   ------------
   PRINCIPAL
    AMOUNT
    ------
              CORPORATE BONDS -- 0.7%
              BUSINESS SERVICES -- 0.6%
 $1,500,000   GP Strategies Corp.,
                Sub. Deb., 6.000%,
                08/14/08 (a)(c) .........    1,181,701      1,001,931
                                          ------------   ------------
              COMPUTER SOFTWARE AND SERVICES -- 0.0%
    100,000   Exodus Communications
                Inc., Sub. Deb. Cv.,
                5.250%,
                02/15/08+ (a)(b) ........        2,250              0
                                          ------------   ------------
              ENERGY AND UTILITIES -- 0.1%
    250,000   Mirant Corp., Deb. Cv.,
                2.500%,
                06/15/21+ (b) ...........      188,752        268,906
                                          ------------   ------------
              RETAIL -- 0.0%
    200,000   RDM Sports Group Inc.,
                Sub. Deb.,8.000%,
                08/15/03+ (a)(b) ........        4,000              0
                                          ------------   ------------
              TRANSPORTATION -- 0.0%
    850,000   Builders Transport Inc.,
                Sub. Deb. Cv., 6.500%,
                05/01/11+ (a)(b) ........        8,500              0
                                          ------------   ------------
              TOTAL CORPORATE
                BONDS ...................    1,385,203      1,270,837
                                          ------------   ------------
    SHARES
    ------
              WARRANTS -- 0.4%
              BUSINESS SERVICES -- 0.3%
    196,823   GP Strategies Corp.,
                expire
                08/14/08+ (a)(c) ........      477,799        635,421
                                          ------------   ------------
              CONSUMER PRODUCTS -- 0.0%
     10,396   Pillowtex Corp.,
                expire 11/24/09+ ........       45,461              1
                                          ------------   ------------

                                                            MARKET
    SHARES                                    COST           VALUE
    ------                                    ----          ------
              DIVERSIFIED INDUSTRIAL -- 0.1%
    284,777   National Patent
                Development Corp.,
                expire
                08/14/08+ (a)(c) ........ $          0   $    111,295
      6,533   WHX Corp.,
                expire 02/28/08+ ........       53,205         11,923
                                          ------------   ------------
                                                53,205        123,218
                                          ------------   ------------
              TOTAL WARRANTS ............      576,465        758,640
                                          ------------   ------------
   PRINCIPAL
    AMOUNT
    ------
              U.S. GOVERNMENT OBLIGATIONS -- 11.4%
$20,308,000   U.S. Treasury Bills,
                3.506% to 3.947%++,
                01/12/06 to
                03/23/06 ................   20,186,577     20,184,430
                                          ------------   ------------
              TOTAL
                INVESTMENTS --
                90.9% ................... $158,130,287    160,958,207
                                          ============
              OTHER ASSETS AND
                LIABILITIES
                (NET) -- 9.1% ...........                  16,031,130
                                                         ------------
              NET ASSETS -- 100.0% ......                $176,989,337
                                                         ============

- ----------------
(a) Security fair valued under procedures established by the Board of Directors.
    The procedures may include reviewing available financial information about
    the company and reviewing valuation of comparable securities and other
    factors on a regular basis. At December 31, 2005, the market value of fair
    valued securities amounted to $1,806,648 or 1.02% of total net assets.
(b) Security in default.
(c) At December 31, 2005, the Fund held investments in restricted and illiquid
    securities amounting to $1,748,647 or 0.99% of net assets, which were valued
    under methods approved by the Board as follows:

ACQUISITION                                                             12/31/05
  SHARES/                                                               CARRYING
 PRINCIPAL                                     ACQUISITION ACQUISITION   VALUE
  AMOUNT   ISSUER                                 DATE        COST      PER UNIT
  ------   ------                              ----------- -----------  --------
  284,777  National Patent Development Corp.
             warrants expire 08/14/08 ........  11/24/04  $     0.00    $ 0.3908
  196,823  GP Strategies Corp.
             warrants expire 08/14/08 ........  08/08/03     477,799      3.2284
$1,500,000 GP Strategies Corp., Sub. Deb.,
             6.000%, 08/14/08 ................  08/08/03   1,022,201     66.7954

 +   Non-income producing security.
 ++  Represents annualized yield at date of purchase.
 ADR American Depository Receipt
 CVO Contingent Value Obligation

                 See accompanying notes to financial statements.

                                       8


                              THE GABELLI ABC FUND

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

ASSETS:
  Investments, at value (cost $158,130,287) ................      $ 160,958,207
  Foreign currency, at value (cost $15,488,010) ............         15,381,344
  Cash .....................................................                817
  Receivable for investments sold ..........................            698,023
  Dividends and interest receivable ........................            107,267
  Receivable for Fund shares sold ..........................                150
  Other assets .............................................              7,483
                                                                  -------------
  TOTAL ASSETS .............................................        177,153,291
                                                                  -------------
LIABILITIES:
  Payable for investment advisory fees .....................             78,206
  Payable for shareholder communications expenses ..........             36,405
  Payable for legal and audit fees .........................             26,069
  Other accrued expenses ...................................             23,274
                                                                  -------------
  TOTAL LIABILITIES ........................................            163,954
                                                                  -------------
  NET ASSETS applicable to 17,969,190
     shares outstanding ....................................      $ 176,989,337
                                                                  =============
NET ASSETS CONSIST OF:
  Capital stock, at $0.001 par value .......................      $      17,969
  Additional paid-in capital ...............................        174,606,633
  Accumulated distributions in excess
    of net investment income ...............................           (133,555)
  Accumulated distributions in excess
    of net realized gain on investments and
    foreign currency transactions ..........................           (213,927)
  Net unrealized appreciation on investments ...............          2,827,920
  Net unrealized depreciation on
      foreign currency translations ........................           (115,703)
                                                                  -------------
  NET ASSETS ...............................................      $ 176,989,337
                                                                  =============

  NET ASSET VALUE, offering and redemption price per
     share ($176,989,337 / 17,969,190 shares outstanding;
     1,000,000,000 shares authorized) ......................              $9.85
                                                                          =====


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

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $11,876) ...............      $  1,008,800
  Interest ..................................................         3,463,391
                                                                   ------------
  TOTAL INVESTMENT INCOME ...................................         4,472,191
                                                                   ------------
EXPENSES:
  Investment advisory fees ..................................         2,369,551
  Shareholder communications expenses .......................            66,063
  Shareholder services fees .................................            51,258
  Custodian fees ............................................            44,573
  Legal and audit fees ......................................            39,984
  Registration fees .........................................            24,689
  Directors' fees ...........................................             9,655
  Miscellaneous expenses ....................................            87,007
                                                                   ------------
  TOTAL EXPENSES ............................................         2,692,780
  Less:
  Custodian fee credits .....................................           (27,751)
  Fees waived (see Note 3) ..................................        (1,184,775)
                                                                   ------------
  NET EXPENSES ..............................................         1,480,254
                                                                   ------------
  NET INVESTMENT INCOME .....................................         2,991,937
                                                                   ------------
NET REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS AND FOREIGN CURRENCY:
  Net realized gain on investments ..........................         6,808,595
  Net realized loss on foreign currency transactions ........           (57,649)
  Net change in unrealized appreciation/depreciation
    on investments and foreign currency translations ........           862,232
                                                                   ------------
  NET REALIZED AND UNREALIZED GAIN (LOSS) ON
    INVESTMENTS AND FOREIGN CURRENCY ........................         7,613,178
                                                                   ------------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS .........................................      $ 10,605,115
                                                                   ============


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


                                                                           YEAR ENDED           YEAR ENDED
                                                                        DECEMBER 31, 2005    DECEMBER 31, 2004
                                                                        -----------------    -----------------
                                                                                         
OPERATIONS:
  Net investment income ...............................................   $   2,991,937        $   2,577,778
  Net realized gain on investments and foreign currency transactions ..       6,750,946            2,617,205
  Net change in unrealized appreciation/depreciation on
    investments and foreign currency translations .....................         862,232              620,592
                                                                          -------------        -------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS ................      10,605,115            5,815,575
                                                                          -------------        -------------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income ...............................................      (2,627,453)          (2,296,707)
  Net realized gain on investments ....................................      (5,954,327)          (2,840,663)
                                                                          -------------        -------------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS .................................      (8,581,780)          (5,137,370)
                                                                          -------------        -------------
CAPITAL SHARE TRANSACTIONS:
  Net increase (decrease) in net assets from capital share transactions    (126,289,556)           6,506,698
                                                                          -------------        -------------
  REDEMPTION FEES .....................................................             332                   27
                                                                          -------------        -------------
  NET INCREASE (DECREASE) IN NET ASSETS ...............................    (124,265,889)           7,184,930
NET ASSETS:
  Beginning of period .................................................     301,255,226          294,070,296
                                                                          -------------        -------------
  End of period (including undistributed net investment
    income of $0 and $0, respectively) ................................   $ 176,989,337        $ 301,255,226
                                                                          =============        =============



                 See accompanying notes to financial statements.

                                       9


THE GABELLI ABC FUND
NOTES TO FINANCIAL STATEMENTS
================================================================================

1. ORGANIZATION. The Gabelli ABC Fund (the "Fund"), a series of Gabelli Investor
Funds, Inc. (the "Corporation"), was organized on October 30, 1992 as a Maryland
corporation.  The  Fund  is a  non-diversified  open-end  management  investment
company  registered  under the  Investment  Company Act of 1940, as amended (the
"1940 Act").  The Fund's primary  objective is to achieve total returns that are
attractive to investors in various market  conditions  without excessive risk of
capital  loss.  The Fund  commenced  investment  operations  on May 14, 1993.

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

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

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

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

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit  guidelines  established  by the  Adviser  and  reviewed by the
Board.  Under  the  terms of a  typical  repurchase  agreement,  the Fund  takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that

                                       10


THE GABELLI ABC FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2005, there were no open repurchase agreements.

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

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

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

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

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

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

                                       11


THE GABELLI ABC FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

settlement  date  on  investment  securities   transactions,   foreign  currency
transactions,  and the difference  between the amounts of interest and dividends
recorded on the books of the Fund and the amounts actually received. The portion
of foreign  currency  gains and losses  related to fluctuation in exchange rates
between the  initial  trade date and  subsequent  sale trade date is included in
realized gain/(loss) on investments.

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

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

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

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.

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.

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

DIVIDENDS AND  DISTRIBUTIONS  TO  SHAREHOLDERS.  Dividends and  distributions to
shareholders are recorded on the ex-dividend date. Distributions to shareholders
are based on income and capital gains as  determined in accordance  with Federal
income tax  regulations,  which may differ  from  income  and  capital  gains as
determined  under  U.S.  generally   accepted   accounting   principles.   These
differences  are  primarily  due to differing  treatments of income and gains on
various  investment  securities and foreign  currency  transactions  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund. Distributions from net investment income include net realized gains
on  foreign  currency  transactions.   These  book/tax  differences  are  either
temporary or permanent in nature. To the extent these differences are permanent,
adjustments are made to the  appropriate  equity accounts in the period when the
differences arise. These reclassifications have no impact on the net asset value
("NAV") of the Fund,  including  the Fund's use of the tax  accounting  practice
known as equalization, and the calculation of net

                                       12


THE GABELLI ABC FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

investment  income  per  share  in  the  Financial   Highlights  excludes  these
adjustments.  For the year ended December 31, 2005,  reclassifications were made
to increase  accumulated  distributions  in excess of net  investment  income by
$420,539  and to increase  accumulated  distributions  in excess of net realized
gain on  investments  by $916,684,  with an offsetting  adjustment to additional
paid-in capital.

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

                                             YEAR ENDED           YEAR ENDED
                                          DECEMBER 31, 2005    DECEMBER 31, 2004
                                          -----------------    -----------------
         DISTRIBUTIONS PAID FROM:
         Ordinary income (inclusive of
           short-term capital gains) ......  $9,621,608            $5,386,566
         Net long-term capital gains ......     191,573                    --
                                             ----------            ----------
         Total distributions paid .........  $9,813,181            $5,386,566
                                             ==========            ==========

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

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


                  Net unrealized appreciation ............. $2,519,735
                  Other temporary differences .............   (155,000)
                                                            ----------
                  Total accumulated gain .................. $2,364,735
                                                            ==========

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

                                        GROSS          GROSS      NET UNREALIZED
                                     UNREALIZED     UNREALIZED     APPRECIATION/
                         COST       APPRECIATION   DEPRECIATION   (DEPRECIATION)
                         ----       ------------   ------------   --------------
      Investments ...$158,322,769    $4,919,474    $(2,284,036)     $2,635,438

3.  INVESTMENT  ADVISORY  AGREEMENT.  The Fund has  entered  into an  investment
advisory  agreement (the "Advisory  Agreement")  with the Adviser which provides
that the Fund will pay the Adviser a fee,  computed  daily and paid monthly,  at
the  annual  rate of 1.00% of the  value of its  average  daily net  assets.  In
accordance  with the  Advisory  Agreement,  the  Adviser  provides a  continuous
investment program for the Fund's portfolio,  oversees the administration of all
aspects of the Fund's  business and affairs,  and pays the  compensation  of all
Officers and  Directors of the Fund who are  affiliated  persons of the Adviser.
Since April 1, 2002, the Adviser has  voluntarily  agreed to reduce its advisory
fee by 0.50%,  but may increase or decrease  the advisory fee rate  reduction at
any time.  The Fund's  expenses  were reduced by  $1,184,775  for the year ended
December 31, 2005. Such amounts are not recoverable in future years.

4.  DISTRIBUTION  PLAN.  The  Board  of  Directors  of  the  Fund  approved  the
elimination of the Fund's  distribution and service plan (the "Plan") adopted by
the Fund  pursuant to rule 12b-1 under the 1940 Act effective as of February 25,
2004.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the year ended December 31, 2005, other than short-term  securities,  aggregated
$380,133,040 and  $149,151,427,  respectively.

6.  TRANSACTIONS  WITH AFFILIATES.  During the year ended December 31, 2005, the
Fund paid brokerage commissions of $226,313 to Gabelli & Company.

                                       13


THE GABELLI ABC FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

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

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

8. CAPITAL STOCK  TRANSACTIONS.  Transactions in shares of capital stock were as
follows:


                                          YEAR ENDED                        YEAR ENDED
                                       DECEMBER 31, 2005                 DECEMBER 31, 2004
                                -----------------------------       ---------------------------
                                   SHARES           AMOUNT            SHARES         AMOUNT
                                -----------     -------------       ----------     ------------
                                                                       
Shares sold ...................     593,644     $   5,899,245        5,283,745     $ 52,102,231
Shares issued upon
   reinvestment of dividends ..     640,813         6,305,599          396,288        3,899,474
Shares redeemed ............... (13,838,307)     (138,494,400)      (5,013,498)     (49,495,007)
                                -----------     -------------       ----------     ------------
  Net increase (decrease) ..... (12,603,850)    $(126,289,556)         666,535     $  6,506,698
                                ===========     =============       ==========     ============


Effective  June 15,  2005 the Fund  imposed  a  redemption  fee of 2.00% on Fund
shares  that are  redeemed or  exchanged  on or before the seventh day after the
date of a purchase.  (From  November 1, 2004  through  June 14,  2005,  the Fund
imposed a redemption  fee on shares that were  redeemed or exchanged  within the
sixtieth day after the date of a purchase.)  The redemption fee is deducted from
the proceeds otherwise payable to the redeeming  shareholders and is retained by
the Fund.  The  redemption  fees  retained  by the Fund  during the years  ended
December 31, 2005 and December 31, 2004 amounted to $332 and $27, respectively.

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

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

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

                                       14



THE GABELLI ABC FUND
FINANCIAL HIGHLIGHTS
================================================================================

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


                                                                           YEAR ENDED DECEMBER 31,
                                                             --------------------------------------------------------
                                                              2005         2004        2003         2002        2001
                                                             ------       ------      ------       ------      ------
                                                                                                
OPERATING PERFORMANCE:
   Net asset value, beginning of period .................. $   9.85     $   9.83    $   9.64     $   9.65    $   9.45
                                                           --------     --------    --------     --------    --------
   Net investment income .................................     0.17         0.08        0.05         0.07        0.10
   Net realized and unrealized gain on investments .......     0.32         0.11        0.43         0.01        0.33
                                                           --------     --------    --------     --------    --------
   Total from investment operations ......................     0.49         0.19        0.48         0.08        0.43
                                                           --------     --------    --------     --------    --------
DISTRIBUTIONS TO SHAREHOLDERS:
   Net investment income .................................    (0.15)       (0.08)      (0.01)       (0.05)      (0.09)
   Net realized gain on investments ......................    (0.34)       (0.09)      (0.28)       (0.04)      (0.14)
                                                           --------     --------    --------     --------    --------
   Total distributions ...................................    (0.49)       (0.17)      (0.29)       (0.09)      (0.23)
                                                           --------     --------    --------     --------    --------
REDEMPTION FEES ..........................................     0.00(b)      0.00(b)       --           --          --
                                                           --------     --------    --------     --------    --------
   NET ASSET VALUE, END OF PERIOD ........................ $   9.85     $   9.85    $   9.83     $   9.64    $   9.65
                                                           ========     ========    ========     ========    ========
   Total return+ .........................................     5.0%         1.9%        4.9%         0.9%        4.6%
                                                           ========     ========    ========     ========    ========
RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA:
   Net assets, end of period (in 000's) .................. $176,989     $301,255    $294,070     $261,014    $167,409
   Ratio of net investment income to
      average net assets .................................    1.26%        0.83%       0.59%       0.74%        1.43%
   Ratio of operating expenses to average
     net assets before fees waived .......................    1.14%        1.15%       1.40%        1.39%       1.46%(a)
   Ratio of operating expenses to average
     net assets net of fees waived .......................    0.64%(c)     0.61%       0.65%       0.99%        1.46%(a)
   Portfolio turnover rate ...............................     127%         141%        244%         252%        308%


- ---------
  + Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including reinvestment of dividends.
(a) The fund incurred  interest expense during the year ended December 31, 2001.
    If interest expense had not been incurred,  the ratio of operating  expenses
    to average net assets would have been 1.44%.
(b) Amount represents less than $0.005 per share.
(c) The ratios do not include a reduction of expenses for  custodian fee credits
    on cash balances maintained with the custodian. Including such custodian fee
    credits,  the expense  ratio for the year ended  December  31, 2005 would be
    0.62%.

                 See accompanying notes to financial statements.

                                       15


THE GABELLI ABC FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Directors of
Gabelli Investor Funds, Inc.

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

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

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

                                                           /s/ ERNST & YOUNG LLP
Philadelphia, Pennsylvania
February 14, 2006

                                       16


THE GABELLI ABC FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================

The  business  and affairs of the Fund are managed  under the  direction  of the
Fund's Board of Directors.  Information pertaining to the Directors and officers
of the Fund is set forth below. The Fund's  Statement of Additional  Information
includes  additional  information  about The Gabelli ABC Fund  Directors  and is
available,  without charge, upon request, by calling 800-GABELLI  (800-422-3554)
or by  writing  to The  Gabelli  ABC  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 DIRECTOR        DURING PAST FIVE YEARS                HELD BY DIRECTOR 4
- -----------------    ------------- ----------------     ----------------------                ------------------
                                                                                   
INTERESTED DIRECTORS 3:
- ----------------------
MARIO J. GABELLI       Since 1993         24       Chairman of the Board and Chief Executive   Director of Morgan Group
Director and                                       Officer of GAMCO Investors, Inc. and        Holdings, Inc. (holding
Chief Investment Officer                           Chief Investment Officer - Value            company)
Age: 63                                            Portfolios of Gabelli Funds, LLC
                                                   and GAMCO Asset Management Inc.;
                                                   Chairman and Chief Executive
                                                   Officer of Lynch Interactive
                                                   Corporation (multimedia and
                                                   services)

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

VINCENT D. ENRIGHT     Since 1993         14       Former Senior Vice President and            Director of Aphton
Director                                           Chief Financial Officer of                  Corporation
Age: 62                                            KeySpan Energy Corporation                  (biopharmaceuticals)

MARY E. HAUCK          Since 2000          3       Retired Senior Manager of the Gabelli             --
Director                                           O'Connor Fixed Income Mutual Funds
Age: 63                                            Management Company

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


                                       17


THE GABELLI ABC FUND
ADDITIONAL FUND INFORMATION (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 2003        Executive Vice President and Chief Operating
President and Treasurer                  Officer of Gabelli Funds, LLC since 1988 and
Age: 54                                  an officer of all of the registered investment
                                         companies in the Gabelli Funds complex. Director
                                         and President of Gabelli Advisers, Inc. since
                                         1998.

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

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


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

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

                   2005 TAX NOTICE TO SHAREHOLDERS (Unaudited)

  For the fiscal year ended December 31, 2005, the Fund paid to  shareholders an
  ordinary  income dividend  (comprised of net investment  income and short-term
  capital gains) totaling $0.48 and a distribution  from long-term  capital gain
  totaling $0.01 per share which is designated as a capital gain  dividend.  For
  the fiscal year ended December 31, 2005, 6.46% of the ordinary income dividend
  qualifies for the dividend received deduction  available to corporations,  and
  11.06% of the ordinary income distribution was qualified dividend income.

  U.S. GOVERNMENT INCOME:

  The percentage of the ordinary  income dividend paid by the Fund during fiscal
  year 2005 which was derived from U.S.  Treasury  securities  was 22.94%.  Such
  income is exempt from state and local tax in all states. However, many states,
  including New York and California,  allow a tax exemption for a portion of the
  income earned only if a mutual fund has invested at least 50% of its assets at
  the  end of  each  quarter  of the  Fund's  fiscal  year  in  U.S.  Government
  securities. The Gabelli ABC Fund did not meet this strict requirement in 2005.
  Due to the  diversity in state and local tax law, it is  recommended  that you
  consult your personal tax advisor as to the  applicability  of the information
  provided to your specific situation.
- --------------------------------------------------------------------------------

                                       18


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

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

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

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

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

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

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


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


                               BOARD OF DIRECTORS

Mario J. Gabelli, CFA                            Mary E. Hauck
CHAIRMAN AND CHIEF                               FORMER SENIOR PORTFOLIO MANAGER
EXECUTIVE OFFICER                                GABELLI-O'CONNOR FIXED INCOME
GAMCO INVESTORS, INC.                            MUTUAL FUND MANAGEMENT CO.

Anthony J. Colavita                              Werner J. Roeder, MD
ATTORNEY-AT-LAW                                  MEDICAL DIRECTOR
ANTHONY J. COLAVITA, P.C.                        LAWRENCE HOSPITAL

Vincent D. Enright
FORMER SENIOR VICE PRESIDENT
AND CHIEF FINANCIAL OFFICER
KEYSPAN ENERGY CORP.


                                    OFFICERS

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

Peter D. Goldstein
CHIEF COMPLIANCE OFFICER


                                   DISTRIBUTOR
                             Gabelli & Company, Inc.


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


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

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

GAB408Q405AR


                                          [GRAPHIC OMITTED]
                                          TRIANGLE ART

                                          THE
                                          GABELLI
                                          ABC
                                          FUND



                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2005




ITEM 2. CODE OF ETHICS.

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

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

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


ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

As of the end of the period  covered by the report,  the  registrant's  Board of
Directors  has  determined  that  Vincent D. Enright 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
         $28,900 in 2005 and $26,300 in 2004.

AUDIT-RELATED FEES

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


TAX FEES

     (c) The  aggregate  fees  billed in each of the last two  fiscal  years for
         professional  services  rendered by the  principal  accountant  for tax
         compliance,  tax advice, and tax planning are $3,600 in 2005 and $3,400
         in 2004.

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

ALL OTHER FEES

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

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

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

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

                           (b) N/A

                           (c) 100%

                           (d) N/A


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

     (g) The aggregate non-audit fees billed by the registrant's  accountant for
         services  rendered to the registrant,  and rendered to the registrant's
         investment  adviser  (not  including  any  sub-adviser  whose  role  is
         primarily portfolio management and is subcontracted with or overseen by
         another investment adviser), and any entity controlling, controlled by,
         or under common control with the adviser that provides ongoing services
         to the  registrant  for  each  of the  last  two  fiscal  years  of the
         registrant was $68,600 in 2005 and $68,400 in 2004.

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

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.



ITEM 6. SCHEDULE OF INVESTMENTS.

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



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

Not applicable.



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

Not applicable.



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

Not applicable.


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

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


ITEM 11. CONTROLS AND PROCEDURES.

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


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


ITEM 12. EXHIBITS.

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

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

     (a)(3)   Not applicable.

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


                                   SIGNATURES

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

(registrant) Gabelli Investor Funds, Inc.
            --------------------------------------------------------------------

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

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


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


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

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



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