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

                                   FORM N-CSR

              CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
                              INVESTMENT COMPANIES

                  Investment Company Act file number 811-04873
                                                    -----------

                              The GAMCO Growth Fund
       -----------------------------------------------------------------
               (Exact name of registrant as specified in charter)

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

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

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

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

                     Date of reporting period: June 30, 2007
                                              ---------------


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

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





ITEM 1.  REPORTS TO STOCKHOLDERS.

The Report to Shareholders is attached herewith.

                              THE GAMCO GROWTH FUND

                               SEMI-ANNUAL REPORT
                                  JUNE 30, 2007

TO OUR SHAREHOLDERS,

      During the second quarter of 2007, The GAMCO Growth Fund (the "Fund") rose
7.2%,  while the Russell 1000 Growth Index and the Standard & Poor's ("S&P") 500
Index were up 6.9% and 6.3%,  respectively.  For the six month period ended June
30,  2007,  the Fund gained  8.5% versus  gains of 8.1% and 7.0% for the Russell
1000 Growth Index and the S&P 500 Index, respectively.

      Enclosed are the financial  statements and the investment  portfolio as of
June 30, 2007.

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

                AVERAGE ANNUAL RETURNS THROUGH JUNE 30, 2007 (A)
                ------------------------------------------------


                                                                                                              Since
                                           Year to                                                          Inception
                                 Quarter    Date    1 Year   3 Year   5 Year   10 Year   15 Year   20 Year  (4/10/87)
- ---------------------------------------------------------------------------------------------------------------------
                                                                                  
  GAMCO GROWTH FUND
    CLASS AAA (B)................ 7.16%    8.46%    15.84%   10.06%    9.36%    5.79%     9.84%    11.31%    11.63%
  S&P 500 Index.................. 6.27     6.96     20.57    11.67    10.70     7.13     11.18     10.81     10.77
  Russell 1000 Growth Index...... 6.86     8.13     19.04     8.70     9.28     4.39      9.03      9.36      9.59
  Class A........................ 7.16     8.46     15.83    10.07     9.37     5.80      9.84     11.31     11.63
                                  1.00(c)  2.22(c)   9.17(c)  7.92(c)  8.08(c)  5.17(c)   9.41(c)  10.99(c)  11.30(c)
  Class B........................ 6.98     8.05     14.96     9.23     8.79     5.52      9.65     11.17     11.48
                                  1.98(d)  3.05(d)   9.96(d)  8.39(d)  8.50(d)  5.52      9.65     11.17     11.48
  Class C........................ 6.98     8.05     14.96     9.25     8.79     5.52      9.65     11.17     11.48
                                  5.98(e)  7.05(e)  13.96(e)  9.25     8.79     5.52      9.65     11.17     11.48

THE CURRENT  EXPENSE  RATIO FOR CLASS AAA,  A, B, AND C SHARES IS 1.44%,  1.44%,
2.19%, AND 2.19%, RESPECTIVELY. CLASS AAA SHARES DO NOT HAVE A SALES CHARGE. THE
MAXIMUM  SALES CHARGE FOR CLASS A, B, AND C SHARES IS 5.75%,  5.00%,  AND 1.00%,
RESPECTIVELY.
(a) RETURNS  REPRESENT PAST  PERFORMANCE  AND DO NOT GUARANTEE  FUTURE  RESULTS.
    TOTAL RETURNS AND AVERAGE ANNUAL RETURNS  REFLECT CHANGES IN SHARE PRICE AND
    REINVESTMENT OF DISTRIBUTIONS  AND ARE NET OF EXPENSES.  INVESTMENT  RETURNS
    AND THE PRINCIPAL  VALUE OF AN INVESTMENT  WILL  FLUCTUATE.  WHEN SHARES ARE
    REDEEMED,  THEY  MAY BE  WORTH  MORE  OR  LESS  THAN  THEIR  ORIGINAL  COST.
    PERFORMANCE  RETURNS  FOR  PERIODS  LESS  THAN ONE YEAR ARE NOT  ANNUALIZED.
    CURRENT  PERFORMANCE  MAY BE  LOWER OR  HIGHER  THAN  THE  PERFORMANCE  DATA
    PRESENTED.  VISIT WWW.GABELLI.COM FOR PERFORMANCE INFORMATION AS OF THE MOST
    RECENT  MONTH  END.  INVESTORS  SHOULD  CAREFULLY  CONSIDER  THE  INVESTMENT
    OBJECTIVES,  RISKS, CHARGES, AND EXPENSES OF THE FUND BEFORE INVESTING.  THE
    PROSPECTUS CONTAINS MORE INFORMATION ABOUT THIS AND OTHER MATTERS AND SHOULD
    BE READ CAREFULLY BEFORE INVESTING.
    THE  CLASS AAA  SHARES'  NET ASSET  VALUES  ("NAV'S")  PER SHARE ARE USED TO
    CALCULATE  PERFORMANCE  FOR THE  PERIODS  PRIOR TO THE  ISSUANCE  OF CLASS A
    SHARES,  CLASS B SHARES, AND CLASS C SHARES ON DECEMBER 31, 2003. THE ACTUAL
    PERFORMANCE  FOR THE CLASS B SHARES AND CLASS C SHARES WOULD HAVE BEEN LOWER
    DUE TO THE ADDITIONAL  EXPENSES ASSOCIATED WITH THESE CLASSES OF SHARES. THE
    S&P 500 INDEX AND THE RUSSELL 1000 GROWTH INDEX ARE UNMANAGED  INDICATORS OF
    STOCK  MARKET  PERFORMANCE.  DIVIDENDS  ARE  REINVESTED.  YOU CANNOT  INVEST
    DIRECTLY IN AN INDEX.
(b) EFFECTIVE  FEBRUARY 15, 2007, CLASS AAA SHARES ARE OFFERED ONLY TO INVESTORS
    WHO WERE  SHAREHOLDERS IN ONE OR MORE OF THE REGISTERED FUNDS DISTRIBUTED BY
    GABELLI & COMPANY, INC. PRIOR TO FEBRUARY 15, 2007.
(c) INCLUDES THE EFFECT OF THE MAXIMUM  5.75% SALES  CHARGE AT THE  BEGINNING OF
    THE PERIOD.
(d) PERFORMANCE  RESULTS  INCLUDE  THE  DEFERRED  SALES  CHARGES FOR THE CLASS B
    SHARES UPON  REDEMPTION AT THE END OF THE QUARTER,  YEAR TO DATE,  ONE YEAR,
    THREE YEAR,  AND FIVE YEAR PERIODS OF 5%, 5%, 5%, 3%, AND 2%,  RESPECTIVELY,
    OF THE FUND'S NAV AT THE TIME OF PURCHASE OR SALE, WHICHEVER IS LOWER. CLASS
    B SHARES ARE NOT AVAILABLE FOR NEW PURCHASES.
(e) PERFORMANCE  RESULTS  INCLUDE  THE  DEFERRED  SALES  CHARGES FOR THE CLASS C
    SHARES UPON REDEMPTION AT THE END OF THE QUARTER, YEAR TO DATE, AND ONE YEAR
    PERIODS OF 1% OF THE FUND'S NAV AT THE TIME OF PURCHASE  OR SALE,  WHICHEVER
    IS LOWER.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
We  have  separated  the  portfolio  manager's  commentary  from  the  financial
statements  and  investment  portfolio due to corporate  governance  regulations
stipulated by the  Sarbanes-Oxley  Act of 2002. We have done this to ensure that
the content of the portfolio manager's commentary is unrestricted. The financial
statements and investment  portfolio are mailed  separately from the commentary.
Both the  commentary  and the financial  statements,  including the portfolio of
investments, will be available on our website at www.gabelli.com/funds.
- --------------------------------------------------------------------------------




THE GAMCO GROWTH FUND
DISCLOSURE OF FUND EXPENSES (UNAUDITED)
For the Six Month Period from January 1, 2007 through June 30, 2007
                                                                   EXPENSE TABLE
- --------------------------------------------------------------------------------

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

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

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

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

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

Please note that the  expenses  shown in the table are meant to  highlight  your
ongoing  costs only and do not  reflect  any  transactional  costs such as sales
charges (loads),  redemption fees, or exchange fees, if any, which are described
in the Prospectus. If these costs were applied to your account, your costs would
be higher.  Therefore, the 5% hypothetical return is useful in comparing ongoing
costs only,  and will not help you determine the relative  total costs of owning
different funds.

                   Beginning         Ending      Annualized      Expenses
                 Account Value   Account Value    Expense      Paid During
                   01/01/07        06/30/07         Ratio         Period*
- --------------------------------------------------------------------------------
THE GAMCO GROWTH FUND
- --------------------------------------------------------------------------------
ACTUAL FUND RETURN
Class AAA          $1,000.00       $1,084.60        1.47%         $ 7.56
Class A            $1,000.00       $1,084.60        1.47%         $ 7.56
Class B            $1,000.00       $1,080.50        2.22%         $11.39
Class C            $1,000.00       $1,080.50        2.22%         $11.39
HYPOTHETICAL 5% RETURN
Class AAA          $1,000.00       $1,017.41        1.47%         $ 7.31
Class A            $1,000.00       $1,017.41        1.47%         $ 7.31
Class B            $1,000.00       $1,013.71        2.22%         $11.02
Class C            $1,000.00       $1,013.71        2.22%         $11.02

*   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.


                                       2


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

The following table presents portfolio holdings as a percent of total net assets
as of June 30, 2007:

THE GAMCO GROWTH FUND

Software & Services...........................       13.1%
Industrial....................................       12.7%
Financial ....................................       11.3%
Energy........................................       10.3%
Retail........................................        7.2%
Semiconductors ...............................        6.7%
Consumer Staples .............................        6.5%
Pharmaceuticals & Biotechnology ..............        5.8%
Health Care Equipment & Services .............        4.9%
Communications Equipment......................        4.8%
Media ........................................        4.2%
Telecommunications............................        4.2%
Computers & Peripherals ......................        3.3%
Hotels and Gaming.............................        2.4%
Materials.....................................        2.1%
U.S. Treasury Bills...........................        1.8%
Other Assets and Liabilities (Net)............       (1.3)%
                                                     ------
                                                     100.0%
                                                     ======


THE FUND FILES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS WITH THE SECURITIES AND
EXCHANGE  COMMISSION (THE "SEC") FOR THE FIRST AND THIRD QUARTERS OF EACH FISCAL
YEAR ON FORM N-Q,  THE LAST OF WHICH WAS FILED FOR THE  QUARTER  ENDED MARCH 31,
2007.  SHAREHOLDERS MAY OBTAIN THIS INFORMATION AT WWW.GABELLI.COM OR BY CALLING
THE FUND AT 800-GABELLI (800-422-3554).  THE FUND'S FORM N-Q IS AVAILABLE ON THE
SEC'S  WEBSITE AT  WWW.SEC.GOV  AND MAY ALSO BE REVIEWED AND COPIED AT THE SEC'S
PUBLIC  REFERENCE  ROOM IN WASHINGTON,  DC.  INFORMATION ON THE OPERATION OF THE
PUBLIC REFERENCE ROOM MAY BE OBTAINED BY CALLING 1-800-SEC-0330.


PROXY VOTING

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







                                       3



THE GAMCO GROWTH FUND
SCHEDULE OF INVESTMENTS -- JUNE 30, 2007 (UNAUDITED)
================================================================================

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

              COMMON STOCKS -- 99.5%
              CONSUMER DISCRETIONARY -- 13.8%
              HOTELS AND GAMING -- 2.4%
     120,000  Boyd Gaming Corp...................  $  6,109,095    $  5,902,800
     117,000  Hilton Hotels Corp.................     3,677,164       3,915,990
      60,000  Las Vegas Sands Corp.+.............     4,824,159       4,583,400
      72,000  Marriott International Inc.,
                Cl. A ...........................     2,816,184       3,113,280
      58,000  Starwood Hotels & Resorts
                Worldwide Inc....................     3,688,012       3,890,060
                                                   ------------    ------------
                                                     21,114,614      21,405,530
                                                   ------------    ------------
              MEDIA -- 4.2%
     470,000  Comcast Corp., Cl. A+..............    12,401,707      13,216,400
     235,000  News Corp., Cl. B..................     4,791,301       5,390,900
      50,000  The McGraw-Hill Companies
                Inc. ............................     1,484,439       3,404,000
     355,000  Time Warner Inc....................     7,684,916       7,469,200
     220,000  Viacom Inc., Cl. B+................     8,524,840       9,158,600
                                                   ------------    ------------
                                                     34,887,203      38,639,100
                                                   ------------    ------------
              RETAIL -- 7.2%
      60,000  Abercrombie & Fitch Co.,
                Cl. A  ..........................     4,890,051       4,378,800
     170,000  Coach Inc.+........................     6,666,260       8,056,300
     385,000  CVS Caremark Corp..................    13,747,391      14,033,250
      65,000  Kohl's Corp.+......................     4,636,184       4,616,950
      90,000  NIKE Inc., Cl. B...................     4,650,059       5,246,100
     110,000  Nordstrom Inc......................     5,880,678       5,623,200
      50,000  Polo Ralph Lauren Corp.............     4,277,681       4,905,500
     110,000  Starbucks Corp.+...................     3,163,365       2,886,400
      75,000  Target Corp........................     4,413,403       4,770,000
     133,400  Tiffany & Co.......................     3,643,349       7,078,204
     120,000  Whole Foods Market Inc.............     5,929,425       4,596,000
                                                   ------------    ------------
                                                     61,897,846      66,190,704
                                                   ------------    ------------
              TOTAL CONSUMER
                DISCRETIONARY ...................   117,899,663     126,235,334
                                                   ------------    ------------
              CONSUMER STAPLES -- 6.5%
     400,000  PepsiCo Inc........................    20,595,636      25,940,000
     395,000  Procter & Gamble Co................    22,250,279      24,170,050
     220,000  Walgreen Co........................     6,934,218       9,578,800
                                                   ------------    ------------
              TOTAL CONSUMER
                STAPLES .........................    49,780,133      59,688,850
                                                   ------------    ------------
              ENERGY -- 10.3%
      92,000  Apache Corp........................     6,554,062       7,506,280
     140,000  Canadian Natural
                Resources Ltd....................     7,502,964       9,289,000
     235,000  Chesapeake Energy Corp.............     8,332,270       8,131,000
      38,000  EnCana Corp........................     1,865,397       2,335,100

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

      66,000  GlobalSantaFe Corp.................  $  3,929,239    $  4,768,500
      80,000  Hess Corp..........................     3,768,013       4,716,800
     110,000  Murphy Oil Corp....................     6,369,483       6,538,400
      60,000  National Oilwell Varco Inc.+.......     3,990,993       6,254,400
      83,000  Noble Corp.........................     6,431,810       8,094,160
     140,000  Occidental Petroleum Corp..........     7,165,299       8,103,200
      88,000  Schlumberger Ltd...................     4,346,073       7,474,720
     100,000  Suncor Energy Inc..................     7,502,350       8,992,000
      78,000  Transocean Inc.+...................     6,143,160       8,266,440
      72,000  XTO Energy Inc.....................     3,352,375       4,327,200
                                                   ------------    ------------
              TOTAL ENERGY.......................    77,253,488      94,797,200
                                                   ------------    ------------
              FINANCIAL -- 11.3%
      68,000  Affiliated Managers
                Group Inc.+   ...................     6,770,724       8,755,680
     375,000  American Express Co................    17,892,512      22,942,500
      70,000  Merrill Lynch & Co. Inc............     3,437,986       5,850,600
      70,000  Moody's Corp.......................     4,657,198       4,354,000
     100,000  Morgan Stanley.....................     8,459,109       8,388,000
     165,900  Northern Trust Corp................     9,532,388      10,657,416
     148,800  State Street Corp..................     7,048,651      10,177,920
     128,000  T. Rowe Price Group Inc............     5,445,643       6,641,920
      80,000  The Goldman Sachs
                Group Inc. ......................    13,824,717      17,340,000
     145,000  UBS AG.............................     7,056,748       8,701,450
                                                   ------------    ------------
              TOTAL FINANCIAL....................    84,125,676     103,809,486
                                                   ------------    ------------
              HEALTH CARE -- 10.7%
              HEALTH CARE EQUIPMENT & SERVICES -- 4.9%
      86,000  Alcon Inc..........................     9,865,989      11,602,260
     130,000  St. Jude Medical Inc.+.............     5,141,691       5,393,700
     190,000  Stryker Corp.......................     9,929,919      11,987,100
      70,000  UnitedHealth Group Inc.............     3,872,633       3,579,800
     145,000  Zimmer Holdings Inc.+..............    10,397,832      12,309,050
                                                   ------------    ------------
                                                     39,208,064      44,871,910
                                                   ------------    ------------
              PHARMACEUTICALS & BIOTECHNOLOGY -- 5.8%
     210,000  Celgene Corp.+.....................    12,412,774      12,039,300
      85,000  Genentech Inc.+....................     7,228,806       6,431,100
     140,000  Gilead Sciences Inc.+..............     4,604,780       5,427,800
     100,800  Novo Nordisk A/S, ADR..............     8,022,451      10,952,928
     615,000  Schering-Plough Corp...............    17,326,174      18,720,600
                                                   ------------    ------------
                                                     49,594,985      53,571,728
                                                   ------------    ------------
              TOTAL HEALTH CARE..................    88,803,049      98,443,638
                                                   ------------    ------------
              INDUSTRIAL -- 12.7%
      70,000  C.H. Robinson
                Worldwide Inc....................     2,670,173       3,676,400
     250,000  Emerson Electric Co................    10,637,459      11,700,000
      80,000  Expeditors International of
                Washington Inc...................     3,515,454       3,304,000

                 See accompanying notes to financial statements.

                                       4


THE GAMCO GROWTH FUND
SCHEDULE OF INVESTMENTS (CONTINUED) -- JUNE 30, 2007 (UNAUDITED)
================================================================================

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

              COMMON STOCKS (CONTINUED)
              INDUSTRIAL (CONTINUED)
      35,000  First Solar Inc.+..................  $  3,050,566    $  3,125,150
      70,000  General Dynamics Corp.                  2,885,557       5,475,400
     880,000  General Electric Co................    30,473,822      33,686,400
     240,000  ITT Corp...........................    11,117,197      16,387,200
     130,000  L-3 Communications
                Holdings Inc. ...................     9,832,493      12,660,700
     140,000  Rockwell Collins Inc...............     8,344,809       9,889,600
      25,000  SunPower Corp., Cl. A+.............     1,615,554       1,576,250
      40,000  Suntech Power Holdings
                Co. Ltd., ADR+...................     1,424,548       1,458,800
     195,000  United Technologies Corp. .........     9,590,780      13,831,350
                                                   ------------    ------------
              TOTAL INDUSTRIAL...................    95,158,412     116,771,250
                                                   ------------    ------------
              INFORMATION TECHNOLOGY -- 27.9%
              COMMUNICATIONS EQUIPMENT -- 4.8%
     941,000  Cisco Systems Inc.+................    22,433,222      26,206,850
     130,000  Harris Corp........................     6,357,775       7,091,500
     240,000  QUALCOMM Inc.......................    10,893,789      10,413,600
                                                   ------------    ------------
                                                     39,684,786      43,711,950
                                                   ------------    ------------
              COMPUTERS & PERIPHERALS -- 3.3%
     119,000  Apple Inc.+........................    10,472,682      14,522,760
      80,000  Research In Motion Ltd.+...........    11,757,815      15,999,200
                                                   ------------    ------------
                                                     22,230,497      30,521,960
                                                   ------------    ------------
              SEMICONDUCTORS -- 6.7%
     415,000  Intel Corp.........................    10,456,318       9,860,400
     230,000  MEMC Electronic Materials
                Inc.+  ..........................    13,843,665      14,057,600
     100,000  Microchip Technology Inc...........     2,886,052       3,704,000
     230,000  NVIDIA Corp.+......................     7,898,295       9,501,300
     635,000  Texas Instruments Inc..............    19,669,264      23,895,050
                                                   ------------    ------------
                                                     54,753,594      61,018,350
                                                   ------------    ------------
              SOFTWARE & SERVICES -- 13.1%
     455,000  Adobe Systems Inc.+................    16,459,252      18,268,250
     180,000  Akamai Technologies Inc.+..........     9,412,987       8,755,200
      90,000  Autodesk Inc.+.....................     3,546,022       4,237,200
      30,000  DST Systems Inc.+..................     2,195,134       2,376,300
     210,000  eBay Inc.+.........................     7,682,324       6,757,800
      79,900  Google Inc., Cl. A+................    23,393,530      41,818,062
      25,000  MasterCard Inc., Cl. A.............     2,732,051       4,146,750
     695,000  Microsoft Corp.....................    17,939,989      20,481,650
     175,000  NAVTEQ Corp.+......................     7,407,198       7,409,500
     235,000  Yahoo! Inc.+.......................     7,721,481       6,375,550
                                                   ------------    ------------
                                                     98,489,968     120,626,262
                                                   ------------    ------------
              TOTAL INFORMATION
                TECHNOLOGY.......................   215,158,845     255,878,522
                                                   ------------    ------------

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

              MATERIALS -- 2.1%
      87,000  Allegheny Technologies Inc.........  $  9,162,969    $  9,124,560
     110,000  Commercial Metals Co...............     1,968,277       3,714,700
     130,000  E.I. du Pont de Nemours
                & Co. ...........................     6,823,045       6,609,200
                                                   ------------    ------------
              TOTAL MATERIALS....................    17,954,291      19,448,460
                                                   ------------    ------------
              WIRELESS COMMUNICATIONS -- 4.2%
              TELECOMMUNICATIONS -- 4.2%
     220,000  America Movil SAB de CV,
                Cl. L, ADR ......................    10,485,517      13,624,600
     210,000  China Mobile Ltd., ADR.............    10,479,259      11,319,000
     320,000  Rogers Communications
                Inc., Cl. B .....................    11,259,538      13,596,800
                                                   ------------    ------------
                                                     32,224,314      38,540,400
                                                   ------------    ------------
              TOTAL WIRELESS
                COMMUNICATIONS...................    32,224,314      38,540,400
                                                   ------------    ------------
              TOTAL COMMON STOCKS ...............   778,357,871     913,613,140
                                                   ------------    ------------
   PRINCIPAL
    AMOUNT
   ---------
              U.S. GOVERNMENT OBLIGATIONS -- 1.8%
 $16,641,000  U.S. Treasury Bills,
                4.760% to 4.991%++,
                07/12/07 to 09/27/07.............    16,449,946      16,453,373
                                                   ------------    ------------
              TOTAL
                INVESTMENTS -- 101.3%              $794,807,817     930,066,513
                                                   ============
              OTHER ASSETS AND LIABILITIES (NET) -- (1.3)%          (11,546,349)
                                                                   ------------
              NET ASSETS -- 100.0%.............................    $918,520,164
                                                                   ============
- ----------------
 +   Non-income producing security.
 ++  Represents annualized yield at date of purchase.
 ADR American Depository Receipt


                 See accompanying notes to financial statements.


                                       5


                              THE GAMCO GROWTH FUND

STATEMENT OF ASSETS AND LIABILITIES
JUNE 30, 2007 (UNAUDITED)
================================================================================

ASSETS:
  Investments, at value (cost $794,807,817)          $  930,066,513
  Receivable for Fund shares sold..................         241,339
  Dividends receivable.............................         667,520
  Prepaid expense..................................          15,629
                                                     --------------
  TOTAL ASSETs.....................................     930,991,001
                                                     --------------
LIABILITIES:
  Payable to custodian.............................          41,005
  Payable for Fund shares redeemed.................       6,806,380
  Payable for investments purchased................       3,869,161
  Payable for investment advisory fees.............         743,457
  Payable for distribution fees....................         186,360
  Payable for accounting fees......................           3,626
  Other accrued expenses...........................         820,848
                                                     --------------
  TOTAL LIABILITIES................................      12,470,837
                                                     --------------
  NET ASSETS applicable to 27,656,188
    shares outstanding.............................  $  918,520,164
                                                     ==============
NET ASSETS CONSIST OF:
  Paid-in capital, each class at $0.01 par value     $1,673,052,517
  Accumulated net investment loss..................      (2,350,109)
  Accumulated net realized loss on investments.....    (887,440,940)
  Net unrealized appreciation on investments            135,258,696
                                                     --------------
  NET ASSETS.......................................  $  918,520,164
                                                     ==============
SHARES OF BENEFICIAL INTEREST:
  CLASS AAA:
  Net Asset Value, offering and redemption price
    per share ($917,451,411 / 27,623,347
    shares outstanding; unlimited number
    of shares authorized)..........................          $33.21
                                                             ======
  CLASS A:
  Net Asset Value and redemption price per share
    ($239,896 / 7,221 shares outstanding;
    unlimited number of shares authorized).........          $33.22
                                                             ======
  Maximum offering price per share (NAV / .9425,
    based on maximum sales charge of 5.75%
    of the offering price).........................          $35.25
                                                             ======
  CLASS B:
  Net Asset Value and offering price per share
    ($312,462 / 9,658 shares outstanding;
    unlimited number of shares authorized).........          $32.35(a)
                                                             ======
  CLASS C:
  Net Asset Value and offering price per share
    ($516,395 / 15,962 shares outstanding;
    unlimited number of shares authorized).........          $32.35(a)
                                                             ======
- --------------------
(a) Redemption price varies based on the length of time held.

STATEMENT OF OPERATIONS
FOR THE SIX MONTHS ENDED JUNE 30, 2007 (UNAUDITED)
================================================================================

INVESTMENT INCOME:
  Dividends (net of foreign taxes of $143,275).....     $ 4,213,887
  Interest.........................................         222,755
                                                        -----------
  TOTAL INVESTMENT INCOME..........................       4,436,642
                                                        -----------
EXPENSES:
  Investment advisory fees.........................       4,616,374
  Distribution fees - Class AAA....................       1,152,906
  Distribution fees - Class A......................             311
  Distribution fees - Class B......................           1,477
  Distribution fees - Class C.....................            2,029
  Shareholder services fees........................         584,718
  Shareholder communications expenses..............         205,635
  Custodian fees...................................          63,046
  Legal and audit fees.............................          37,451
  Trustees' fees...................................          34,656
  Accounting fees..................................          22,375
  Registration expenses............................          20,245
  Interest expense.................................           3,035
  Miscellaneous expenses...........................          44,764
                                                        -----------
  TOTAL EXPENSES...................................       6,789,022
  Less: Custodian fee credits......................          (2,271)
                                                        -----------
  NET EXPENSES.....................................       6,786,751
                                                        -----------
  NET INVESTMENT LOSS..............................      (2,350,109)
                                                        -----------
NET REALIZED AND UNREALIZED GAIN
  ON INVESTMENTS:
  Net realized gain on investments.................      49,953,619
  Net change in unrealized appreciation/
    depreciation on investments....................      28,384,131
                                                        -----------
  NET REALIZED AND UNREALIZED GAIN
    ON INVESTMENTS.................................      78,337,750
                                                        -----------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS................................     $75,987,641
                                                        ===========


                See accompanying notes to financial statements.

                                       6


                              THE GAMCO GROWTH FUND

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


                                                                              SIX MONTHS ENDED
                                                                                JUNE 30, 2007          YEAR ENDED
                                                                                 (UNAUDITED)        DECEMBER 31, 2006
                                                                              ----------------      -----------------

                                                                                                
OPERATIONS:
  Net investment loss......................................................     $  (2,350,109)       $   (1,935,652)
  Net realized gain on investments.........................................        49,953,619           124,028,687
  Net change in unrealized appreciation/depreciation on investments........        28,384,131           (60,720,080)
                                                                                -------------        --------------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS.....................        75,987,641            61,372,955
                                                                                -------------        --------------
SHARES OF BENEFICIAL INTEREST TRANSACTIONS:
  Class AAA................................................................      (115,269,810)         (244,152,530)
  Class A..................................................................           (58,390)              (14,124)
  Class C..................................................................            82,535              (176,602)
                                                                                -------------        --------------
  NET DECREASE IN NET ASSETS FROM SHARES OF BENEFICIAL INTEREST TRANSACTIONS     (115,245,665)         (244,343,256)
                                                                                -------------        --------------
  REDEMPTION FEES..........................................................               692                 6,591
                                                                                -------------        --------------
  NET DECREASE IN NET ASSETS...............................................       (39,257,332)         (182,963,710)

NET ASSETS:
  Beginning of period......................................................       957,777,496         1,140,741,206
                                                                                -------------        --------------
  End of period (including undistributed net investment income
    of $0 and $0, respectively)............................................     $ 918,520,164        $  957,777,496
                                                                                =============        ==============


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

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

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

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


                                       7


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

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

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

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

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

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

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

                                       8


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

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

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

CUSTODIAN FEE CREDITS AND INTEREST EXPENSE. When cash balances are maintained in
the  custody  account,  the Fund  receives  credits  which  are  used to  offset
custodian  fees.  The gross  expenses  paid under the  custody  arrangement  are
included in custodian fees in the Statement of Operations with the corresponding
expense offset, if any, shown as "custodian fee credits". When cash balances are
overdrawn, the Fund is charged an overdraft fee equal to 2.00% above the Federal
Funds rate on  outstanding  balances.  This  amount,  if any,  would be shown as
"interest expense" in the Statement of Operations.

DISTRIBUTIONS TO SHAREHOLDERS. Distributions to shareholders are recorded on the
ex-dividend date.  Distributions to shareholders are based on income and capital
gains as determined in accordance with federal income tax regulations, which may
differ from income and capital gains as determined under U.S. generally accepted
accounting  principles.   These  differences  are  primarily  due  to  differing
treatments  of income and gains on  various  investment  securities  held by the
Fund, timing differences,  and differing characterizations of distributions made
by the Fund.  These book/tax  differences  are either  temporary or permanent in
nature. To the extent these  differences are permanent,  adjustments are made to
the appropriate capital accounts in the period when the differences arise. These
reclassifications have no impact on the NAV of the Fund.

No distributions were made during the fiscal year ended December 31, 2006.

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

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

The following  summarizes the tax cost of investments and the related unrealized
appreciation/(depreciation) at June 30, 2007:


                                                      GROSS            GROSS
                                                    UNREALIZED       UNREALIZED      NET UNREALIZED
                                     COST          APPRECIATION     DEPRECIATION      APPRECIATION
                                     ----          ------------     ------------      ------------
                                                                          
 Investments.............        $798,330,192      $144,866,770     $(13,130,449)     $131,736,321


                                       9


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

In July 2006, the FASB issued Interpretation No. 48, "Accounting for Uncertainty
in  Income  Taxes,   an   Interpretation   of  FASB  Statement  No.  109"  ("the
Interpretation").  The  Interpretation  established for all entities,  including
pass-through  entities  such as the Fund,  a  minimum  threshold  for  financial
statement  recognition  of the benefit of positions  taken in filing tax returns
(including  whether  an entity is  taxable in a  particular  jurisdiction),  and
required certain expanded tax disclosures. The Interpretation was implemented by
the Fund on June 29, 2007 and applied to all open tax years as of the  effective
date.  Management  has evaluated the  application of the  Interpretation  to the
Fund,  and the  adoption  of the  Interpretation  had no impact  on the  amounts
reported in the financial statements.

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

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

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

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the six months ended June 30, 2007, other than short-term securities, aggregated
$456,272,436 and $556,556,148, respectively.

6. TRANSACTIONS WITH AFFILIATES.  During the six months ended June 30, 2007, the
Fund paid brokerage  commissions of $39,448 to Gabelli & Company.  Additionally,
Gabelli  &  Company  informed  the Fund  that it  received  $73  from  investors
representing  commissions  (sales  charges and  underwriting  fees) on sales and
redemptions of Fund shares.

The cost of calculating  the Fund's NAV per share is a Fund expense  pursuant to
the Advisory  Agreement between the Fund and the Adviser.  During the six months
ended  June 30,  2007,  the Fund  paid or  accrued  $22,375  to the  Adviser  in
connection with the cost of computing the Fund's NAV.

                                       10


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

7.  LINE OF  CREDIT.  Effective  June  20,  2007,  the Fund  participates  in an
unsecured line of credit of up to  $75,000,000,  and may borrow up to 10% of its
net assets from the custodian for temporary  borrowing  purposes.  Prior to June
20, 2007, the line of credit was $25,000,000.  Borrowings under this arrangement
bear  interest at 0.75% above the Federal  Funds rate on  outstanding  balances.
This amount,  if any,  would be shown as "interest  expense" in the Statement of
Operations.  During the six months ended June 30, 2007, there were no borrowings
under the line of credit.

8. SHARES OF  BENEFICIAL  INTEREST.  The Fund  currently  offers four classes of
shares - Class AAA Shares,  Class A Shares,  Class B Shares, and Class C Shares.
Effective  February 15, 2007, Class AAA Shares are offered only to investors who
were  shareholders  prior to that  date in one or more of the  registered  funds
distributed  by  Gabelli  &  Company.  Class AAA  Shares  are  offered  to these
investors only through selected  broker/dealers  or the transfer agent without a
sales charge.  Class A Shares are subject to a maximum front-end sales charge of
5.75%. Class B Shares are subject to a contingent deferred sales charge ("CDSC")
upon redemption within six years of purchase and automatically  convert to Class
A Shares  approximately eight years after the original purchase.  The applicable
CDSC is equal to a  declining  percentage  of the lesser of the NAV per share at
the date of the  original  purchase or at the date of  redemption,  based on the
length of time  held.  Class C Shares  are  subject to a 1.00% CDSC for one year
after  purchase.  Class B Shares are available only through  exchange of Class B
Shares of other funds  distributed by Gabelli & Company.  The Board has approved
Class I Shares which have not been offered publicly.

The Fund imposes a redemption fee of 2.00% on Class AAA Shares,  Class A Shares,
Class B Shares,  and Class C Shares that are  redeemed or exchanged on or before
the  seventh day after the date of a purchase.  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 six
months ended June 30, 2007 and the fiscal year ended  December 31, 2006 amounted
to $692 and $6,591, respectively.

The  redemption fee does not apply to redemptions of shares where (i) the shares
were   purchased   through   automatic   reinvestment   of  dividends  or  other
distributions,  (ii) the redemption was initiated by the Fund,  (iii) the shares
were purchased  through  programs that collect the redemption fee at the program
level and remit them to the Fund,  or (iv) the  shares  were  purchased  through
programs that the Adviser determines to have appropriate anti-short-term trading
policies  in place or as to which  the  Adviser  has  received  assurances  that
look-through  redemption  fee  procedures or effective  anti-short-term  trading
policies and procedures are in place.






                                       11


THE GAMCO GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)(UNAUDITED)
================================================================================
Transactions in shares of beneficial interest were as follows:



                                                           SIX MONTHS ENDED
                                                             JUNE 30, 2007                      YEAR ENDED
                                                              (UNAUDITED)                    DECEMBER 31, 2006
                                                    ----------------------------       ----------------------------
                                                       SHARES          AMOUNT            SHARES          AMOUNT
                                                    ----------     -------------       -----------    -------------
                                                               CLASS AAA                         CLASS AAA
                                                    ----------------------------       ----------------------------
                                                                                          
Shares sold .......................................    685,153     $  21,623,580         2,450,572    $  71,744,626
Shares redeemed.................................... (4,312,892)     (136,893,390)      (10,762,763)    (315,897,156)
                                                    ----------     -------------       -----------    -------------
  Net decrease..................................... (3,627,739)    $(115,269,810)       (8,312,191)   $(244,152,530)
                                                    ==========     =============       ===========    =============

                                                                CLASS A                           CLASS A
                                                    ----------------------------       ----------------------------
Shares sold .......................................      1,055     $      31,907             1,400    $      40,639
Shares redeemed....................................     (2,856)          (90,297)           (1,881)         (54,763)
                                                    ----------     -------------       -----------    -------------
  Net decrease.....................................     (1,801)    $     (58,390)             (481)   $     (14,124)
                                                    ==========     =============       ===========    =============


                                                                CLASS C                           CLASS C
                                                    ----------------------------       ----------------------------
Shares sold .......................................      7,906     $     243,706             2,965    $      85,939
Shares redeemed....................................     (5,348)         (161,171)           (9,040)        (262,541)
                                                    ----------     -------------       -----------    -------------
  Net increase (decrease)..........................      2,558     $      82,535            (6,075)   $    (176,602)
                                                    ==========     =============       ===========    =============


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

10. OTHER MATTERS.  The Adviser and/or  affiliates  received  subpoenas from the
Attorney General of the State of New York and the SEC requesting  information on
mutual fund share  trading  practices  involving  certain  funds  managed by the
Adviser.  GAMCO  Investors,   Inc.  ("GAMCO"),  the  Adviser's  parent  company,
responded to these  requests for documents and  testimony.  In June 2006,  GAMCO
began discussions with the SEC regarding a possible resolution of their inquiry.
In February  2007,  the Adviser made an offer of  settlement to the staff of the
SEC for  communication  to the Commission for its  consideration to resolve this
matter.  This offer of settlement is subject to agreement regarding the specific
language of the SEC's administrative order and other settlement documents.  On a
separate matter, in September 2005, the Adviser was informed by the staff of the
SEC that the staff may recommend to the Commission that an administrative remedy
and a monetary penalty be sought from the Adviser in connection with the actions
of two of seven  closed-end  funds  managed by the  Adviser  relating to Section
19(a)  and Rule  19a-1 of the 1940  Act.  These  provisions  require  registered
investment  companies  to provide  written  statements  to  shareholders  when a
dividend is made from a source other than net investment  income.  While the two
closed-end funds sent annual statements and provided other materials  containing
this information, the funds did not send written statements to shareholders with
each  distribution in 2002 and 2003. The Adviser  believes that all of the funds
are now in  compliance.  The Adviser  believes  that these matters would have no
effect on the Fund or any material  adverse effect on the Adviser or its ability
to manage the Fund.


                                       12


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

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


                           INCOME FROM INVESTMENT OPERATIONS
                         --------------------------------------
                                          Net
              Net Asset               Realized and      Total
  Period        Value,       Net       Unrealized       from
   Ended      Beginning  Investment  Gain/(Loss) on  Investment
December 31   of Period    Loss(a)    Investments    Operations
- -----------   ---------  ----------  -------------   ----------
                                           
CLASS AAA
   2007(b)      $30.62    $(0.08)       $ 2.67        $ 2.59
   2006          28.81     (0.05)         1.86          1.81
   2005          26.12     (0.13)         2.82          2.69
   2004          24.95     (0.11)         1.28          1.17
   2003          18.99     (0.14)         6.10          5.96
   2002          28.68     (0.17)        (9.52)        (9.69)
CLASS A
   2007(b)      $30.63    $(0.08)       $ 2.67        $ 2.59
   2006          28.82     (0.06)         1.87          1.81
   2005          26.13     (0.12)         2.81          2.69
   2004(e)       24.95     (0.02)         1.20          1.18
CLASS B
   2007(b)      $29.93    $(0.19)       $ 2.61        $ 2.42
   2006          28.38     (0.27)         1.82          1.55
   2005          25.93     (0.32)         2.77          2.45
   2004(e)       24.95     (0.28)         1.26          0.98
CLASS C
   2007(b)      $29.93    $(0.19)       $ 2.61        $ 2.42
   2006          28.38     (0.27)         1.82          1.55
   2005          25.93     (0.32)         2.77          2.45
   2004(e)       24.95     (0.21)         1.19          0.98



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

                             Net Asset           Net Assets
  Period                      Value,               End of       Net                      Portfolio
   Ended       Redemption     End of     Total     Period    Investment    Operating      Turnover
December 31      Fees(a)      Period    Return+  (in 000's)     Loss        Expenses        Rate
- -----------     ---------     -------   -------  ----------  ----------   -----------    ----------
                                                                       
CLASS AAA
   2007(b)       $0.00(c)     $33.21      8.5%   $  917,451    (0.51)%(d)     1.47%(d)       49%
   2006           0.00(c)      30.62      6.3       956,811    (0.19)         1.44           57
   2005           0.00(c)      28.81     10.3     1,139,640    (0.48)         1.49           39
   2004           0.00(c)      26.12      4.7     1,447,655    (0.46)         1.53           31
   2003             --         24.95     31.4     1,881,457    (0.60)         1.47           42
   2002             --         18.99    (33.8)    1,675,816    (0.68)         1.43           30
CLASS A
   2007(b)       $0.00(c)     $33.22      8.5%   $      240    (0.52)%(d)     1.47%(d)       49%
   2006           0.00(c)      30.63      6.3           276    (0.19)         1.44           57
   2005           0.00(c)      28.82     10.3           274    (0.43)         1.47           39
   2004(e)        0.00(c)      26.13      4.7            73    (0.09)         1.60           31
CLASS B
   2007(b)       $0.00(c)     $32.35      8.1%   $      313    (1.26)%(d)     2.22%(d)       49%
   2006           0.00(c)      29.93      5.5           289    (0.94)         2.19           57
   2005           0.00(c)      28.38      9.5           274    (1.22)         2.24           39
   2004(e)        0.00(c)      25.93      3.9           250    (1.12)         2.30           31
CLASS C
   2007(b)       $0.00(c)     $32.35      8.1%   $      516    (1.24)%(d)     2.22%(d)       49%
   2006           0.00(c)      29.93      5.5           401    (0.95)         2.19           57
   2005           0.00(c)      28.38      9.5           553    (1.21)         2.23           39
   2004(e)        0.00(c)      25.93      3.9           226    (0.88)         2.37           31



+   Total return  represents  aggregate  total return of a  hypothetical  $1,000
    investment  at the beginning of the period and sold at the end of the period
    including  reinvestment  of  distributions  and does not reflect  applicable
    sales  charges.  Total  return  for a  period  of less  than one year is not
    annualized.
(a) Per share amounts have been calculated using the average shares  outstanding
    method.
(b) For the six months ended June 30, 2007, unaudited.
(c) Amount represents less than $0.005 per share.
(d) Annualized.
(e) Class A, Class B, and Class C Shares were initially  offered on December 31,
    2003.





                          See accompanying notes to financial statements.

                                       13


                              THE GAMCO GROWTH FUND
BOARD CONSIDERATION AND RE-APPROVAL OF INVESTMENT ADVISORY AGREEMENT (UNAUDITED)

At its meeting on February 22, 2007, the Board of Trustees ("Board") of the Fund
approved the continuation of the investment  advisory agreement with the Adviser
for the Fund on the  basis of the  recommendation  by the  trustees  who are not
"interested  persons"  of  the  Fund  (the  "independent  board  members").  The
following  paragraphs  summarize the material information and factors considered
by the independent board members as well as their  conclusions  relative to such
factors.

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

INVESTMENT  PERFORMANCE.  The  independent  board  members  reviewed  the short,
medium, and long-term  performance of the Fund against a peer group of large cap
growth funds chosen by Lipper as being comparable. The independent board members
noted that the Fund's  performance was in or near the top one-third of the funds
in its category  for the ten year  period,  was in the top one-half of the funds
for the three  year  period  and was in the bottom 25% of the funds for the five
and one year period.

PROFITABILITY. The independent board members reviewed summary data regarding the
profitability  of the Fund to the Adviser both with an  administrative  overhead
charge and without such a charge.  The independent board members also noted that
a substantial  portion of the Fund's portfolio  transactions were executed by an
affiliated broker and that the affiliated broker received  distribution fees and
minor amounts of sales commissions.

ECONOMIES OF SCALE. The independent  board members  discussed the major elements
of the  Adviser's  cost  structure  and the  relationship  of those  elements to
potential economies of scale.

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

SERVICE AND COST COMPARISONS. The independent board members compared the expense
ratios of the investment advisory fee, other expenses, and total expenses of the
Fund to similar  expense ratios of the peer group of large-cap  growth funds and
noted that the advisory fee includes  substantially all administrative  services
of the  Fund  as  well as  investment  advisory  services  of the  Adviser.  The
independent  board members noted that the Fund's  expense  ratios and the Fund's
size were above average within this group.  The  independent  board members also
noted that the advisory fee structure was the same as that in effect for most of
the Gabelli funds.  The  independent  board members were presented with, but did
not consider to be material to their decision, various information comparing the
advisory fee to the fee for other types of accounts managed by affiliates of the
Adviser.

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

                                       14

                             GABELLI FAMILY OF FUNDS

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

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

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

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

SMALL CAP VALUE _____________________________
GABELLI SMALL CAP FUND
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  at the time of investment of $2 billion  or less)  believed  to
have rapid revenue and earnings growth potential. The  Fund's primary  objective
is capital appreciation.
(MULTICLASS)                            PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GAMCO WESTWOOD SMALLCAP EQUITY FUND
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $2.5 billion or less. The Fund's primary  objective is long-term capital
appreciation. (MULTICLASS)            PORTFOLIO MANAGER: ELIZABETH M. LILLY, CFA

GABELLI WOODLAND SMALL CAP VALUE FUND
Seeks to invest  primarily  in the common  stocks of smaller  companies  (market
capitalizations generally less than $3.0  billion) believed  to  be  undervalued
with shareholder oriented management teams that are employing strategies to grow
the company's value. The Fund's primary objective is capital appreciation.
(MULTICLASS)                          PORTFOLIO MANAGER: ELIZABETH M. LILLY, CFA

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

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

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

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

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

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

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

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

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

GABELLI SRI FUND
Seeks to invest in common and preferred stocks of companies that meet the Fund's
guidelines for social responsibility at the time of investment, looking to avoid
companies in tobacco,  alcohol,  and gaming,  defense/weapons  contractors,  and
manufacturers  of  abortifacients.  The  Fund's  primary  objective  is  capital
appreciation. (MULTICLASS)           PORTFOLIO MANAGER: CHRISTOPHER C. DESMARAIS

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

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

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

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

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

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

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

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

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

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

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

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


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

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

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

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

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

John D. Gabelli                           Salvatore J. Zizza
SENIOR VICE PRESIDENT                     CHAIRMAN
GABELLI & COMPANY, INC.                   ZIZZA & CO., LTD.

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

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

Agnes Mullady
TREASURER
                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

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

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

- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
GAMCO  Growth  Fund.  It is  not  authorized  for  distribution  to  prospective
investors unless preceded or accompanied by an effective prospectus.
- --------------------------------------------------------------------------------
GAB406Q207SR

 



                                                                           GAMCO




THE
GAMCO
GROWTH
FUND











                                                              SEMI-ANNUAL REPORT
                                                                   JUNE 30, 2007


ITEM 2.  CODE OF ETHICS.

Not applicable.



ITEM 3.  AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable.



ITEM 4.  PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable.



ITEM 5.  AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.



ITEM 6.  SCHEDULE OF INVESTMENTS.

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



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

Not applicable.



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

Not applicable.



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

Not applicable.



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

There have been no material  changes to the procedures by which the shareholders
may  recommend  nominees  to the  registrant's  Board of  Trustees,  where those
changes were  implemented  after the  registrant  last  provided  disclosure  in
response to the  requirements  of Item  407(c)(2)(iv)  of Regulation S-K (17 CFR
229.407) (as required by Item  22(b)(15) of Schedule 14A (17 CFR  240.14a-101)),
or this Item.


ITEM 11. CONTROLS AND PROCEDURES.

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


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


ITEM 12. EXHIBITS.

     (a)(1)  Not applicable.

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

     (a)(3)  Not applicable.

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







                                   SIGNATURES

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

(registrant) The GAMCO Growth Fund
            --------------------------------------------------------------------

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


Date              August 31, 2007
    ----------------------------------------------------------------------------


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


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


Date              August 31, 2007
    ----------------------------------------------------------------------------


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


Date              August 31, 2007
    ----------------------------------------------------------------------------



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