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 811-01311
                                                     ---------

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

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

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

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

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

                   Date of reporting period: December 31, 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.


                               GAMCO MATHERS FUND

                                  ANNUAL REPORT
                               DECEMBER 31, 2007





TO OUR SHAREHOLDERS,

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

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

      Enclosed are the audited financial statements and the investment portfolio
as of December  31, 2007 with a  description  of the factors  that  affected the
performance during the past year.

PERFORMANCE DISCUSSION (UNAUDITED)

      The GAMCO  Mathers Fund total return for the year ended  December 31, 2007
was 3.56%  versus  5.49% for the  Standard & Poor's 500 Index.  The Fund  earned
positive  returns for each of the first three  quarters  and the  calendar  year
while generally maintaining a net short exposure against a rising market.

      The Fund had a 7.4%  average  net short  portfolio  structure  during 2007
(4.2% long minus  11.6% short based on the average of quarter end net assets) in
deference  to the debt bubble and its  macro-economic  risks.  At year end 2007,
stocks  were  4.4% of net  assets,  with  0.3% in long and  4.1% in short  stock
positions,  resulting  in a  3.8%  net  short  exposure.  The  remainder  of the
portfolio,  as has been the case for an extended  time  period,  was invested in
short-term  U.S.  Treasury  bills and U.S.  Treasury  collateralized  repurchase
agreements  awaiting  investment  opportunities  to initiate  new long and short
positions.  This compares to a 32.3% gross stock exposure (longs plus shorts) at
year end 2006,  comprised  of 12.6%  long and 19.7%  short with a 7.1% net short
exposure (longs minus shorts).

      The  individual  long stocks segment of the portfolio and the fixed income
portion,  which was limited to short-term U.S.  Treasury bills and U.S. Treasury
collateralized repurchase agreements,  added to the Fund's total return in 2007.
The short stocks and equity  indices  segment had a small negative  return.  The
portfolio  remains   conservatively   positioned  to  potentially  benefit  both
absolutely  and  relatively  from a declining  stock  market.  The fixed  income
portion,  which is invested in short-term U.S.  Treasury bills and U.S. Treasury
collateralized repos, has relatively high liquidity and safety of principal.

      During the year,  a portion of the Fund's  long common  stock  segment was
invested in takeover target  companies  subject to friendly,  all cash tender or
merger offers from an acquiring  entity.  The Fund purchases  these event driven
stocks after the deals are publicly announced,  generally by financially strong,
strategic or financial  buyers.  Deal arbitrage stocks typically earn relatively
attractive  annualized returns, but are held for short time periods resulting in
a disproportionately high portfolio turnover rate, which can be misleading. This
occurs when the Fund's fixed income  position is a relatively high proportion of
assets and has a maturity of less than one year,  while the percent  invested in
stocks is low. The Fund uses this defensive,  non-market  correlated strategy to
potentially  increase  cash returns  above the  prevailing  level of  short-term
interest rates.

                                Sincerely yours,

                                /s/ Bruce N. Alpert

                                Bruce N. Alpert
                                Executive Vice President
February 22, 2008



         GROWTH OF $10,000 INVESTMENT IN GAMCO MATHERS FUND (LOG SCALE)
                       [OBJECT OMITTED] [GRAPHIC OMITTED]

[GRAPHIC OMITTED]
PLOT POINTS FOLLOW:
                               GAMCO Mathers Fund         S&P 500 Index
                                  $10,000                   $10,000
           65                      12,122                    10,768
                                   12,632                     9,685
                                   24,332                    12,007
                                   30,868                    13,335
                                   29,016                    12,200
           70                      29,588                    12,688
                                   35,455                    14,504
                                   41,173                    17,256
                                   25,877                    14,731
                                   17,957                    10,832
           75                      28,201                    14,863
                                   40,716                    18,408
                                   46,496                    17,071
                                   53,496                    18,194
                                   78,404                    21,550
           80                     109,990                    28,535
                                  101,473                    27,135
                                  116,548                    32,942
                                  135,388                    40,360
                                  131,890                    42,888
           85                     168,124                    56,518
                                  191,625                    67,095
                                  243,431                    70,614
                                  276,841                    82,310
                                  305,644                   108,360
           90                     337,510                   105,007
                                  369,381                   136,922
                                  380,867                   147,334
                                  389,017                   162,159
                                  366,092                   164,281
           95                     391,770                   225,952
                                  391,477                   277,826
                                  403,249                   370,512
                                  382,225                   476,899
                                  404,074                   577,321
           00                     424,366                   524,741
                                  442,406                   462,376
                                  390,400                   360,187
                                  382,816                   463,522
                                  378,843                   513,924
           05                     383,484                   539,178
                                  394,531                   624,340
                                  408,583                   658,636


PERCENT AVERAGE ANNUAL TOTAL RETURNS THROUGH DECEMBER 31, 2007*



                            1 YR     3 YRS     5 YRS     10 YRS    20 YRS    25 YRS   30 YRS    42 YRS+
                           -------  -------  --------  ---------  --------  --------  -------  --------
                                                                          
GAMCO MATHERS               3.56     2.55      0.91      0.13       2.62      5.15      7.51      9.15
Standard & Poor's 500       5.49     8.62     12.82      5.91      11.81     12.73     12.95     10.38



THE CURRENT EXPENSE RATIO IS 2.14%. + FROM COMMENCEMENT OF INVESTMENT OPERATIONS
ON AUGUST 19, 1965.


 *   AVERAGE   ANNUAL  TOTAL  RETURNS   REFLECT   CHANGES  IN  SHARE  PRICE  AND
     REINVESTMENT OF DIVIDENDS AND ARE NET OF EXPENSES.  RETURNS  REPRESENT PAST
     PERFORMANCE AND DO NOT GUARANTEE FUTURE RESULTS. INVESTMENT RETURNS AND THE
     PRINCIPAL VALUE OF AN INVESTMENT  WILL FLUCTUATE.  WHEN SHARES ARE REDEEMED
     THEY  MAY  BE  WORTH  MORE  OR  LESS  THAN  THEIR  ORIGINAL  COST.  CURRENT
     PERFORMANCE  MAY BE LOWER OR HIGHER THAN THE  PERFORMANCE  DATA  PRESENTED.
     PLEASE VISIT  WWW.GABELLI.COM TO OBTAIN  PERFORMANCE  INFORMATION AS OF THE
     MOST  RECENT  MONTH END.  THE  STANDARD & POOR'S 500 INDEX IS AN  UNMANAGED
     INDICATOR OF STOCK MARKET PERFORMANCE.  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.




NOTE:  The opinions  expressed  in this report  reflect  those of the  Portfolio
Manager  only  through  the date of the  shareholder  letter and are  subject to
change at any time based on market and other conditions.


To obtain a copy of the Fund's  prospectus,  please contact Gabelli Funds at One
Corporate Center, Rye, NY 10580-1422,  by calling 800-GABELLI  (800-422-3554) or
visit our website www.gabelli.com.

                                       2


GAMCO MATHERS FUND
DISCLOSURE  OF FUND  EXPENSES  (UNAUDITED)
For  the Six Month Period from July 1, 2007 through December 31, 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 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, 2007.

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

ACTUAL FUND RETURN
GAMCO Mathers             $1,000.00       $1,007.40        2.39%       $12.16

HYPOTHETICAL 5% RETURN
GAMCO Mathers             $1,000.00       $1,013.23        2.39%       $12.19

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

                                       3


SUMMARY OF PORTFOLIO HOLDINGS (UNAUDITED)

The following table presents portfolio holdings as a percent of total net assets
as of December 31, 2007:



GAMCO MATHERS FUND - LONG POSITIONS             PERCENT
U.S. Government Obligations .................... 94.8%
Repurchase Agreements ..........................  5.1%
Cable and Satellite ............................  0.2%
Environmental Services .........................  0.1%
Other Assets and Liabilities (Net) .............  3.9%




GAMCO MATHERS FUND - SHORT POSITIONS             PERCENT
Exchange Traded Funds .......................... (2.3)%
Equipment ...................................... (0.7)%
Entertainment .................................. (0.5)%
Consumer Products .............................. (0.4)%
Retail ......................................... (0.2)%





THE FUND FILES A COMPLETE SCHEDULE OF PORTFOLIO HOLDINGS WITH THE SECURITIES AND
EXCHANGE  COMMISSION (THE "SEC") FOR THE FIRST AND THIRD QUARTERS OF EACH FISCAL
YEAR ON FORM N-Q,  THE LAST OF WHICH WAS FILED FOR THE QUARTER  ENDED  SEPTEMBER
30, 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.

                                       4


GAMCO MATHERS FUND
SCHEDULE OF INVESTMENTS -- DECEMBER 31, 2007
================================================================================

                                                             MARKET
      SHARES                                      COST        VALUE
      ------                                      ----       ------
              COMMON STOCKS -- 0.3%
              CABLE AND SATELLITE -- 0.2%
       3,000  Comcast Corp., Cl. A+ ........ $    55,560    $    54,780
                                             -----------    -----------
              ENVIRONMENTAL SERVICES -- 0.1%
       1,000  Waste Management Inc. ........      33,584         32,670
                                             -----------    -----------
              TOTAL COMMON STOCKS ..........      89,144         87,450
                                             -----------    -----------

   PRINCIPAL
    AMOUNT
   --------
              SHORT-TERM OBLIGATIONS -- 99.9%
              REPURCHASE AGREEMENTS -- 5.1%
 $ 1,339,123  State Street Bank & Trust Co.,
                1.000%, dated 12/31/07,
                due 01/02/08, proceeds at
                maturity, $1,339,197 (a) ...   1,339,123      1,339,123
                                             -----------    -----------
              U.S. TREASURY BILLS -- 94.8%
  25,000,000  U.S. Treasury Bill,
                3.093%++, 01/17/08 (b) .....  24,966,222     24,966,222
                                             -----------    -----------

              TOTAL SHORT-TERM
                OBLIGATIONS ................  26,305,345     26,305,345
                                             -----------    -----------

              TOTAL
                INVESTMENTS -- 100.2% ...... $26,394,489     26,392,795
                                             ===========
              SECURITIES SOLD SHORT -- (4.1)%
                (Proceeds received $1,109,880)               (1,076,820)

              OTHER ASSETS AND LIABILITIES (NET) -- 3.9%      1,017,187
                                                            -----------
              NET ASSETS -- 100.0% .....................    $26,333,162
                                                            ===========

                                                             MARKET
      SHARES                                    PROCEEDS      VALUE
      ------                                    --------     ------

              SECURITIES SOLD SHORT -- (4.1)%
              COMMON STOCKS SOLD SHORT -- (4.1)%
              CONSUMER PRODUCTS -- (0.4)%
       2,000  Harley-Davidson Inc. ......... $    94,770    $    93,420
                                             -----------    -----------
              ENTERTAINMENT -- (0.5)%
       1,000  Carnival Corp. ...............      45,193         44,490
       1,000  Polaris Industries Inc. ......      49,059         47,770
       1,000  Royal Caribbean Cruises Ltd. .      42,943         42,440
                                             -----------    -----------
                                                 137,195        134,700
                                             -----------    -----------
              EQUIPMENT -- (0.7)%
       2,000  Black & Decker Corp. .........     152,899        139,300
       1,000  The Toro Co. .................      55,039         54,440
                                             -----------    -----------
                                                 207,938        193,740
                                             -----------    -----------
              EXCHANGE TRADED FUNDS -- (2.3)%
       1,000  iShares FTSE/Xinhua China
                25 Index Fund ..............     178,228        170,450
       2,000  iShares Russell 2000 Index ...     154,958        151,840
       2,000  iShares S&P SmallCap 600 Index     132,251        130,040
       1,000  MidCap SPDR Trust, Ser. 1 ....     156,491        155,100
                                             -----------    -----------
                                                 621,928        607,430
                                             -----------    -----------
              RETAIL -- (0.2)%
       1,000  Wal-Mart Stores Inc. .........      48,049         47,530
                                             -----------    -----------
              TOTAL SECURITIES SOLD SHORT .. $ 1,109,880    $ 1,076,820
                                             ===========    ===========
- ----------------
(a)  Collateralized  by $1,165,000  U.S.  Treasury Bond,  6.000%,  due 02/15/26,
     market value $1,371,788.
(b)  At December 31, 2007,  $4,000,000  of the  principal  amount was pledged as
     collateral for securities sold short.
+    Non-income producing security.
++   Represents annualized yield at date of purchase.


                 See accompanying notes to financial statements.


                                       5


                               GAMCO MATHERS FUND


STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2007
================================================================================
ASSETS:
  Investments, at value (cost $25,055,366) .............   $ 25,053,672
  Repurchases agreements, at value (cost $1,339,123) ...      1,339,123
  Receivable for investments sold ......................      1,109,880
  Dividends and interest receivable ....................             37
  Prepaid expenses .....................................         15,201
                                                           ------------
  TOTAL ASSETS .........................................     27,517,913
                                                           ------------
LIABILITIES:
  Securities sold short (proceeds $1,109,880) ..........      1,076,820
  Payable to brokers ...................................          1,393
  Payable for investment advisory fees .................         23,014
  Payable for distribution fees.........................          5,754
  Dividends payable on securities sold short ...........          1,365
  Other accrued expenses ...............................         76,405
                                                           ------------
  TOTAL LIABILITIES ....................................      1,184,751
                                                           ------------
  NET ASSETS applicable to 2,519,555 shares outstanding    $ 26,333,162
                                                           ============
NET ASSETS CONSIST OF:
  Paid-in capital, at $0.001 par value .................   $ 39,983,361
  Accumulated distributions in excess of
    net investment income ..............................        (10,127)
  Accumulated net realized loss on investments
    and securities sold short ..........................    (13,671,438)
  Net unrealized depreciation on investments ...........         (1,694)
  Net unrealized appreciation on
    securities sold short ..............................         33,060
                                                           ------------
  NET ASSETS ...........................................   $ 26,333,162
                                                           ============
  NET ASSET VALUE, offering and redemption price
    per share ($26,333,162 / 2,519,555 shares
    outstanding; unlimited number of shares
    authorized) ........................................         $10.45
                                                                 ======


STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 2007
================================================================================
INVESTMENT INCOME:
  Dividends (net of foreign taxes of $639) .............     $   35,316
  Interest .............................................      1,203,993
  Other income .........................................        120,200
                                                             ----------
  TOTAL INVESTMENT INCOME ..............................      1,359,509
                                                             ----------
EXPENSES:
  Investment advisory fees .............................        299,571
  Distribution fees ....................................         74,893
  Dividends on securities sold short ...................         38,378
  Legal and audit fees .................................         98,930
  Trustees' fees .......................................         59,042
  Shareholder communications expenses ..................         41,240
  Shareholder services fees ............................         36,886
  Custodian fees .......................................          9,298
  Registration expenses ................................          7,270
  Interest expense .....................................          3,854
  Miscellaneous expenses ...............................         15,138
                                                             ----------
  TOTAL EXPENSES .......................................        684,500
  Less: Custodian fee credits ..........................           (203)
                                                             ----------
  NET EXPENSES .........................................        684,297
                                                             ----------
  NET INVESTMENT INCOME ................................        675,212
                                                             ----------
NET REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS AND SECURITIES SOLD SHORT:
  Net realized gain on investments .....................      1,265,416
  Net realized loss on securities sold short ...........       (405,906)
                                                             ----------
  Net realized gain on investments and securities
    sold short .........................................        859,510
                                                             ----------
  Net change in unrealized appreciation/depreciation
    on investments .....................................       (636,796)
  Net change in unrealized appreciation/depreciation
    on securities sold short ...........................        175,766
                                                             ----------
  Net change in unrealized appreciation/depreciation
    on investments and securities sold short ...........       (461,030)
                                                             ----------
  NET REALIZED AND UNREALIZED GAIN (LOSS) ON
    INVESTMENTS AND SECURITIES SOLD SHORT ..............        398,480
                                                             ----------
  NET INCREASE IN NET ASSETS RESULTING
    FROM OPERATIONS ....................................     $1,073,692
                                                             ==========




                 See accompanying notes to financial statements.

                                       6



                               GAMCO MATHERS FUND


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



                                                                                    YEAR ENDED          YEAR ENDED
                                                                                 DECEMBER 31, 2007   DECEMBER 31, 2006
                                                                                 -----------------   -----------------
                                                                                                 
OPERATIONS:
  Net investment income ........................................................    $   675,212        $ 1,004,654
  Net realized gain (loss) on investments and securities sold short ............        859,510         (1,137,490)
  Net change in unrealized appreciation/depreciation on investments
    and securities sold short ..................................................       (461,030)         1,104,868
                                                                                    -----------        -----------
  NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS .........................      1,073,692            972,032
                                                                                    -----------        -----------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income ........................................................       (687,307)        (1,015,302)
                                                                                    -----------        -----------
  TOTAL DISTRIBUTIONS TO SHAREHOLDERS ..........................................       (687,307)        (1,015,302)
                                                                                    -----------        -----------
SHARES OF BENEFICIAL INTEREST TRANSACTIONS:
  Net decrease in net assets from shares of beneficial interest transactions ...     (5,156,485)        (6,467,599)
                                                                                    -----------        -----------
  REDEMPTION FEES ..............................................................              1                 --
                                                                                    -----------        -----------
  NET DECREASE IN NET ASSETS ...................................................     (4,770,099)        (6,510,869)

NET ASSETS:
  Beginning of period ..........................................................     31,103,261         37,614,130
                                                                                    -----------        -----------
  End of period (including undistributed net investment income of
    $0 and $0, respectively) ...................................................    $26,333,162        $31,103,261
                                                                                    ===========        ===========


                 See accompanying notes to financial statements.

                                       7



GAMCO MATHERS FUND
NOTES TO FINANCIAL STATEMENTS
================================================================================

1. ORGANIZATION. GAMCO Mathers Fund (the "Fund"), was organized on June 17, 1999
as a Delaware  statutory  trust.  The Fund  commenced  investment  operations on
October 1, 1999 as the successor to the Mathers Fund,  Inc. (the "Mathers Fund")
which was  organized  on March 31, 1965 as a Maryland  corporation.  The Mathers
Fund  commenced  investment  operations  on  August  19,  1965.  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 long-term capital appreciation.

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. Certain reclassifications have been made in the prior year
financial statements to conform to the current year presentation.  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").

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 American  Depository
Receipt ("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

                                       8

GAMCO MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

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.  As of December 31, 2007,  the Fund
does not  believe the  adoption of SFAS 157 will impact the amounts  reported in
the financial statements.

REPURCHASE  AGREEMENTS.  The Fund may  enter  into  repurchase  agreements  with
primary  government  securities dealers recognized by the Federal Reserve Board,
with  member  banks of the  Federal  Reserve  System,  or with other  brokers or
dealers that meet credit  guidelines  established by the Adviser and reviewed by
the Board.  Under the terms of a typical  repurchase  agreement,  the Fund takes
possession  of an  underlying  debt  obligation  subject to an obligation of the
seller to repurchase,  and the Fund to resell,  the obligation at an agreed-upon
price and time, thereby  determining the yield during the Fund's holding period.
The Fund will always receive and maintain  securities as collateral whose market
value, including accrued interest,  will be at least equal to 102% of the dollar
amount  invested by the Fund in each  agreement.  The Fund will make payment for
such  securities  only upon  physical  delivery  or upon  evidence of book entry
transfer of the collateral to the account of the  custodian.  To the extent that
any repurchase transaction exceeds one business day, the value of the collateral
is marked-to-market on a daily basis to maintain the adequacy of the collateral.
If the seller defaults and the value of the collateral declines or if bankruptcy
proceedings   are  commenced  with  respect  to  the  seller  of  the  security,
realization of the collateral by the Fund may be delayed or limited. At December
31, 2007, the Fund had an investment of $1,339,123 in a repurchase agreement.

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  fluctuations  in the
value    of    the    contract,     which    are    included    in    unrealized
appreciation/depreciation   on  investments  and  futures  contracts.  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, 2007,  there were no
open futures contracts.

SECURITIES SOLD SHORT.  The Fund may enter into short sale  transactions.  Short
selling involves selling  securities that may or may not be owned and, at times,
borrowing the same securities for delivery to the purchaser,  with an obligation
to replace such borrowed  securities at a later date. The proceeds received from
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 an 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.  Securities  sold short at December 31, 2007 are reported in the
Schedule of Investments.

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

                                       9

GAMCO MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

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 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 of 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 net asset value ("NAV") per share of the
Fund. For the fiscal year ended December 31, 2007,  reclassifications  were made
to decrease  accumulated  distributions  in excess of net  investment  income by
$12,616  and to  increase  accumulated  net  realized  loss on  investments  and
securities sold short by $12,616.

The tax character of  distributions  paid during the fiscal years ended December
31, 2007 and December 31, 2006 were $687,307 and $1,015,302 of ordinary income.

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

At December 31, 2007,  the Fund had net capital loss  carryforwards  for federal
income  tax  purposes  of  $13,671,438,  which are  available  to reduce  future
required  distributions  of net capital gains to  shareholders.  $11,623,877  is
available  through  2010;  $670,201  is  available  through  2011;  $280,466  is
available through 2012; and $1,096,894 is available through 2014.

As of December 31, 2007, the components of  accumulated  earnings/(losses)  on a
tax basis were as follows:

      Undistributed ordinary income ...........................  $      2,443
      Accumulated capital loss carryforward ...................   (13,671,438)
      Net unrealized depreciation on investments ..............        (1,694)
      Net unrealized appreciation on securities sold short ....        33,060
      Other temporary differences .............................       (12,570)
                                                                 ------------
      Total ...................................................  $ 13,650,199
                                                                 ============

                                       10

GAMCO MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

During the fiscal year ended  December 31, 2007, the GAMCO Mathers Fund utilized
capital loss carryforwards of $806,298.

The following  summarizes the tax cost of investments,  proceeds of short sales,
and the related unrealized appreciation/(depreciation) at December 31, 2007:


                                                         GROSS            GROSS         NET UNREALIZED
                                     COST/            UNREALIZED       UNREALIZED        APPRECIATION/
                                  (PROCEEDS)         APPRECIATION     DEPRECIATION      (DEPRECIATION)
                                  ----------         ------------     ------------      --------------
                                                                                   
      Investments .............. $25,055,366                 --           $(1,694)         $ (1,694)
      Short sales ..............   1,109,880            $33,060                --            33,060


FASB  Interpretation  No. 48,  "Accounting  for  Uncertainty in Income Taxes, an
Interpretation of FASB Statement No. 109" (the  "Interpretation")  established a
minimum  threshold  for  financial  statement  recognition  of  the  benefit  of
positions taken in filing tax returns  (including whether the Fund is taxable in
a particular jurisdiction) and required certain expanded tax disclosures.

For the fiscal year ended December 31, 2007, the Fund did not have any liability
for any unrecognized tax benefits.  The Fund recognizes  interest and penalties,
if any,  related to  unrecognized  tax  benefits  as income tax  expenses in the
Statement of Operations.  The Fund is not subject to examination by U.S. federal
tax  authorities  for tax years before 2003 and by state tax authorities for tax
years before 2002.

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 who is not considered an affiliated  person an annual
retainer  of $5,000  plus $1,000 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.  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")  pursuant  to Rule 12b-1  under the 1940 Act.  For the fiscal year ended
December 31, 2007,  the Fund  incurred  distribution  costs payable to Gabelli &
Company, Inc. ("Gabelli & Company"), an affiliate of the Adviser, of $74,893, or
0.25% of its average  daily net assets,  the annual  limitation  under the Plan.
Such payments are accrued daily and paid monthly.

5. PORTFOLIO SECURITIES. Purchases and proceeds from the sales of securities for
the fiscal year ended  December  31,  2007,  other than  short-term  securities,
aggregated $4,293,799 and $8,488,968, respectively.

6.  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 fiscal  year ended  December  31,  2007,  there were no
borrowings  outstanding  under  the line of  credit.

                                       11

GAMCO MATHERS FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
================================================================================

7. SHARES OF BENEFICIAL INTEREST.  Transactions in shares of beneficial interest
were as follows:


                                                               YEAR ENDED                        YEAR ENDED
                                                            DECEMBER 31, 2007                 DECEMBER 31, 2006
                                                        ------------------------       ----------------------------
                                                         SHARES         AMOUNT           SHARES           AMOUNT
                                                        --------     ------------      ----------      ------------
                                                                                           
Shares sold ........................................     49,331       $   522,727         321,631      $  3,346,542
Shares issued upon reinvestment of distributions ...     60,396           631,134          89,008           920,344
Shares redeemed ....................................   (593,221)       (6,310,346)     (1,011,815)      (10,734,485)
                                                        -------       -----------      ----------      ------------
  Net decrease .....................................   (483,494)      $(5,156,485)       (601,176)     $ (6,467,599)
                                                        =======       ===========      ==========      ============


The Fund  imposes a  redemption  fee of 2.00% on  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 fiscal  years ended  December  31,  2007 and  December  31, 2006
amounted to $1 and $0, 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.

8.  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.

9. 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 nine 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



GAMCO MATHERS FUND
FINANCIAL HIGHLIGHTS
================================================================================

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



                                                                           YEAR ENDED DECEMBER 31,
                                                            ---------------------------------------------------------
                                                             2007         2006        2005         2004        2003
                                                             ----         ----        ----         ----        ----
                                                                                                 
OPERATING PERFORMANCE:
   Net asset value, beginning of period ................    $ 10.36      $ 10.44     $ 10.49      $ 10.60     $ 10.81
                                                            -------      -------     -------      -------     -------
   Net investment income (loss) (a) ....................       0.24         0.32        0.13        (0.06)      (0.07)
   Net realized and unrealized gain (loss) on investments
     and securities sold short .........................       0.13        (0.02)         --        (0.05)      (0.14)
                                                            -------      -------     -------      -------     -------
   Total from investment operations ....................       0.37         0.30        0.13        (0.11)      (0.21)
                                                            -------      -------     -------      -------     -------
DISTRIBUTIONS TO SHAREHOLDERS:
   Net investment income ...............................      (0.28)       (0.38)      (0.18)          --          --
                                                            -------      -------     -------      -------     -------
   Total distributions .................................      (0.28)       (0.38)      (0.18)          --          --
                                                            -------      -------     -------      -------     -------
   REDEMPTION FEES .....................................       0.00(b)        --        0.00(b)        --          --
                                                            -------      -------     -------      -------     -------
   NET ASSET VALUE, END OF PERIOD ......................    $ 10.45      $ 10.36     $ 10.44      $ 10.49     $ 10.60
                                                            =======      =======     =======      =======     =======
   Total return + ......................................      3.56%        2.88%       1.23%      (1.04)%     (1.94)%
                                                            =======      =======     =======      =======     =======
RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA:
   Net assets, end of period (in 000's) ................    $26,333      $31,103     $37,614      $41,258     $60,846
   Ratio of net investment income (loss) to
     average net assets ................................      2.25%        2.99%       1.27%      (0.61)%     (0.61)%
   Ratio of operating expenses to average net assets ...      2.28%        2.14%       2.14%        1.90%       1.67%
   Ratio of operating expenses to average net assets
     excluding the effect of dividends on securities
     sold short ........................................      2.15%        1.87%       1.85%        1.77%       1.64%
   Portfolio turnover rate .............................       226%         121%        149%         176%        244%


- ------------------
  + 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.
(a) Per share data is calculated  using the average shares  outstanding  method.
(b) Amount represents less than $0.005 per share.

- --------------------------------------------------------------------------------
                   2007 TAX NOTICE TO SHAREHOLDERS (Unaudited)

  For the fiscal year ended December 31, 2007, the Fund paid to  shareholders an
  ordinary income dividend (comprised of net investment income) totaling $0.279.
  For the fiscal year ended  December  31, 2007,  4.08% of the  ordinary  income
  distribution  qualifies  for the  dividends  received  deduction  available to
  corporations,  and 4.77% 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 2007 which was derived from U.S.  Treasury  securities  was 82.42%.  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. GAMCO Mathers Fund met this strict requirement in 2007. Due to the
  diversity in state and local tax law, it is recommended  that you consult your
  personal tax adviser as to the  applicability  of the information  provided to
  your specific situation.
- --------------------------------------------------------------------------------

                 See accompanying notes to financial statements.

                                       13



GAMCO MATHERS FUND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
================================================================================

To the Shareholders and Board of Trustees of
GAMCO Mathers Fund

We have audited the accompanying statement of assets and liabilities,  including
the schedule of investments,  of GAMCO Mathers Fund (the "Fund"), as of December
31, 2007, and the related  statement of operations for the year then ended,  the
statements of changes in net assets for each of the two years in the period then
ended,  and the  financial  highlights  for each of the five 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.

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,  2007,  by  correspondence  with the Fund's
custodian and brokers or by other appropriate  auditing procedures where replies
from brokers were not received.  We believe that our audits provide a reasonable
basis for our opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material respects,  the financial position of GAMCO
Mathers Fund at December 31, 2007,  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 five years in
the period then ended, in conformity  with U.S.  generally  accepted  accounting
principles.

                                                           /s/ Ernst & Young LLP
Philadelphia, Pennsylvania
February 21, 2008


                                       14



                               GAMCO MATHERS FUND

     BOARD CONSIDERATION AND RE-APPROVAL OF MANAGEMENT AGREEMENT (UNAUDITED)

At its meeting on August 14, 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" (the  "independent  trustees") of the Fund.  The following
paragraphs  summarize  the material  information  and factors  considered by the
independent trustees as well as their conclusions relative to such factors.

1) THE NATURE, EXTENT, AND QUALITY OF SERVICES PROVIDED BY THE ADVISER.

The Board  reviewed in detail the nature and extent of the services  provided by
the Adviser under the Agreement and the quality of those  services over the past
year.  The Board noted that these  services  included  managing  the  investment
program of the Fund, including the purchase and sale of portfolio securities, as
well as the provision of general corporate  services.  The Board considered that
the Adviser also provided, at its expense, office facilities for use by the Fund
and  supervisory  personnel  responsible  for  supervising  the  performance  of
administrative,  accounting,  and related services including,  for the Fund, net
asset  value  determinations,  yield  calculations,  and  monitoring  to  assure
compliance with stated investment  policies and restrictions  under the 1940 Act
and  related  securities  regulations.  The Board  noted  that,  in  addition to
managing  the  investment  program for the Fund,  the Adviser  provided  certain
non-advisory and compliance  services,  including services under the Fund's Rule
38a-1 compliance program.

The Board also considered that the Adviser paid for all compensation of Officers
and Board Members of the Fund that were affiliated with the Adviser and that the
Adviser further provided a substantial  level of services to shareholders of the
Fund who had invested  through various programs offered by third party financial
intermediaries  ("Participating  Organizations").   The  Board  evaluated  these
factors based on its direct experience with the Adviser and in consultation with
Fund Counsel. The Board noted that the Adviser had engaged, at its expense, PFPC
Inc. to assist it in performing  certain of its  administrative  functions.  The
Board  concluded  that the  nature  and  extent  of the  services  provided  was
reasonable  and  appropriate  in relation to the advisory fee, that the level of
services provided by the Adviser,  either directly or through PFPC Inc., had not
diminished  over the past year and that the quality of service  continued  to be
high.

The Board reviewed the personnel  responsible for providing services to the Fund
and concluded,  based on their experience and interaction with the Adviser, that
(i) the Adviser was able to retain quality  personnel,  (ii) the Adviser and its
agents  exhibited a high level of diligence  and attention to detail in carrying
out their  advisory and  administrative  responsibilities  under the  Agreement,
(iii) the Adviser was  responsive  to requests of the Board,  (iv) the scope and
depth of the Adviser's resources was adequate,  and (v) the Adviser had kept the
Board apprised of developments relating to the Fund and the industry in general.
The  Board  also  focused  on  the  Adviser's   reputation   and  long  standing
relationship with the Fund. The Board also believed that the Adviser had devoted
substantial resources and made substantial commitments to address new regulatory
compliance requirements applicable to the Fund.


                                       15



                               GAMCO MATHERS FUND

                     BOARD CONSIDERATION AND RE-APPROVAL OF
                  MANAGEMENT AGREEMENT (UNAUDITED) (CONTINUED)


2) THE PERFORMANCE OF THE FUND, THE ADVISER.

The Board reviewed the performance of the Fund since inception. In reviewing the
Fund's  performance,  the Board took into account  that there  appeared to be no
comparable  universe of Funds with similar  investment  strategies and styles as
the Fund.  As a result,  the Board  reviewed  the Fund's  performance  against a
number of different universes and types of Funds. These classifications included
a universe of funds classified by Lipper as Specialty Diversified Equity, Equity
Market Neutral,  Long/Short Equity, and Dedicated Short Bias Funds. In reviewing
these  categories,  the Board  concluded  that the  Dedicated  Short Bias Lipper
category  (the  "Performance  Peer  Group"),   while  imprecise  and  not  fully
comparable,  was more  closely  comparable  to the Fund  than the  other  Lipper
groupings.  The Board  considered  the Fund's  one,  three,  five,  and ten year
average  annual  total return for the periods  ended June 30,  2007,  but placed
greater emphasis on the Fund's longer term performance.  The Fund's  performance
against the  Performance  Peer Group was considered by the Board as providing an
objective comparative benchmark against which the performance could be assessed.
In general,  the Board considered these comparisons  helpful in their assessment
as to whether the Adviser was  obtaining for the Fund's  shareholders  the total
return  performance  that was  available  in the  marketplace,  given the Fund's
investment objective,  strategy,  limitations, and restrictions.  The Board also
considered  that the Portfolio  Manager  believes that U.S.  equity markets were
highly overvalued and as a result, as described in the prospectus, the portfolio
manager  has  invested  the Fund's  assets more  conservatively  than most other
equity  funds.  In this  regard,  the Board  considered  the Fund's  performance
against a smaller  universe  of actively  managed  bear funds  developed  by the
Adviser.  The Board  concluded  that the Fund's  performance  was  reasonable in
comparison  to that of the  Performance  Peer Group  category and the  Adviser's
actively  managed bear fund  grouping.  The Board  further  considered  that the
portfolio  manager,  along  with  accounts  related  to him,  were  the  largest
shareholders of the Fund.

In connection with its assessment of the  performance of the Adviser,  the Board
considered  the Adviser's  financial  condition and whether it had the resources
necessary to continue to carry out its functions under the Agreement.  The Board
concluded that the Adviser had the financial  resources necessary to continue to
perform its obligations  under the Agreement and to continue to provide the high
quality services that it has provided to the Fund to date.

3) THE COST OF THE  ADVISORY  SERVICES  AND THE  PROFITS TO THE  ADVISER AND ITS
AFFILIATES FROM THE RELATIONSHIP WITH THE FUND.

In  connection  with  the  Board's  consideration  of the  cost of the  advisory
services and the profits to the Adviser and its affiliates from the relationship
with the  Fund,  the Board  considered  a number of  factors.  First,  the Board
compared the level of the advisory fee for the Fund against  comparative  Lipper
expense  peer  groups   ("Expense  Peer  Group").   The  Board  also  considered
comparative  non-management  fee expenses and comparative total fund expenses of
the Fund and the Expense Peer Group.  The Board  considered this  information as
useful in assessing  whether the Adviser was  providing  services at a cost that
was  competitive  with other similar funds. In assessing this  information,  the
Board considered both the comparative contract rates as well as the level of the
advisory  fees after  waivers  and/or  reimbursements.  The Board noted that the
Fund's advisory fee was average  compared to those of the Expense Peer Group for
the Fund, but the Fund's expense ratio was higher than those of the Expense Peer
Group for the Fund.

                                       16


                               GAMCO MATHERS FUND

                     BOARD CONSIDERATION AND RE-APPROVAL OF
                  MANAGEMENT AGREEMENT (UNAUDITED) (CONTINUED)


The Board  Members  also  reviewed  the fees  charged by the  Adviser to provide
similar advisory services to other registered  investment  companies or accounts
with similar investment objectives noting that in some cases the fees charged by
the  Adviser  were  higher and in other  cases the same or lower,  than the fees
charged to the Fund.

The Board also  considered an analysis  prepared by the Adviser of the estimated
profitability to the Adviser of its relationship with the Fund and reviewed with
the  Adviser  its  cost   allocation   methodology   in   connection   with  its
profitability. In this regard, the Board reviewed Pro-forma Income Statements of
the Adviser for the year ended  December  31,  2006.  The Board  considered  one
analysis for the Adviser as a whole,  and a second analysis for the Adviser with
respect to the Fund.  With respect to the Fund  analysis,  the Board received an
analysis  based on the Fund's  average net assets during the period as well as a
pro-forma  analysis of profitability at higher and lower asset levels. The Board
concluded  that  the  profitability  of the  Fund to the  Adviser  under  either
analysis was not excessive.

4) THE EXTENT TO WHICH ECONOMIES OF SCALE WILL BE REALIZED AS THE FUND GROWS AND
WHETHER FEE LEVELS REFLECT THOSE ECONOMIES OF SCALE.

With  respect to the Board's  consideration  of  economies  of scale,  the Board
discussed  whether  economies  of scale  would be realized by the Fund at higher
asset levels. The Board also reviewed data from the Expense Peer Group to assess
whether the Expense Peer Group funds had advisory fee breakpoints and, if so, at
what asset  levels.  The Board also  assessed  whether  certain of the Adviser's
costs would  increase if asset levels rise.  The Board noted that the Fund had a
very small asset size and concluded that under foreseeable conditions, they were
unable to assess at this time  whether  economies  of scale would be realized if
the Fund was to experience  significant asset growth. In the event there were to
be  significant  asset  growth in the Fund,  the Board  determined  to  reassess
whether the advisory fee appropriately  took into account any economies of scale
that had been realized as a result of that growth.

5) OTHER FACTORS.

In  addition  to the above  factors,  the Board also  discussed  other  benefits
received by the Adviser from their  management of the Fund. The Board considered
that the Adviser did not use soft dollars in connection  with its  management of
the Fund.

Based on a  consideration  of all these  factors  in their  totality,  the Board
Members,  including all of the  Independent  Board Members,  determined that the
Fund's  advisory  fee was fair and  reasonable  with  respect to the  quality of
services  provided and in light of the other  factors  described  above that the
Board deemed relevant.  Accordingly, the Board Members determined to approve the
continuation of the Fund's advisory  agreement.  The Board based its decision on
evaluations  of all these factors as a whole and did not consider any one factor
as all important or controlling.


                                       17


GAMCO MATHERS FUND
ADDITIONAL FUND INFORMATION (UNAUDITED)
================================================================================

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



                             TERM OF        NUMBER OF
NAME, POSITION(S)          OFFICE AND     FUNDS IN FUND
    ADDRESS(1)              LENGTH OF   COMPLEX OVERSEEN     PRINCIPAL OCCUPATION(S)              OTHER DIRECTORSHIPS
     AND AGE              TIME SERVED(2)   BY TRUSTEE        DURING PAST FIVE YEARS                HELD BY TRUSTEE(5)
     -------              --------------   ----------        ----------------------                ------------------
INTERESTED TRUSTEES:(3)
- -----------------------
                                                                                               
MARIO J. GABELLI, CFA       Since 1999       26      Chairman  and Chief Executive Officer of    Director of Morgan Group
Trustee and Chairman                                 GAMCO Investors, Inc. and Chief Investment  Holdings, Inc. (holding company);
Age: 65                                              Officer - Value Portfolios of Gabelli       Chairman of the Board of LICT
                                                     Funds, LLC and GAMCO Asset Management       Corp.(multimedia and
                                                     Director/Trustee or Inc.; Chief Investment  communication services
                                                     Officer  of other registered investment     company)
                                                     companies in the Gabelli/GAMCO Funds
                                                     complex; Chairman Chief Executive
                                                     Officer of GGCP, Inc.

HENRY G. VAN DER EB, CFA(4) Since 1976        3      Senior Vice President of GAMCO Investors,Inc.        --
Trustee, President and                               since August 2004; President and CEO of
Chief Executive Officer                              GAMCO Mathers Fund since 1999;
Age: 62                                              Senior Vice President and Portfolio
                                                     Manager of Gabelli Funds, LLC and GAMCO
                                                     Asset Management Inc. since 1999
INDEPENDENT TRUSTEES(6):
- ------------------------
E. VAL CERUTTI              Since 2001        7      Chief Executive Officer of Cerutti          Director of The LGL Group,Inc.
Trustee                                              Consultants, Inc.                           (diversified manufacturing)
Age: 68

ANTHONY J. COLAVITA         Since 1999       35      Partner in the law firm of                          --
Trustee                                              Anthony J. Colavita, P.C.
Age: 72

VINCENT D. ENRIGHT          Since 1999       15      Former Senior Vice President and Chief              --
Trustee                                              Financial Officer of KeySpan
Age: 64                                              Corporation (public utility)

ANTHONY R. PUSTORINO        Since 1999       14      Certified Public Accountant;                Director of The LGL Group,Inc.
Trustee                                              Professor Emeritus, Pace University         (diversified manufacturing)
Age: 82

WERNER J. ROEDER, MD        Since 1999       23      Medical Director of Lawrence Hospital               --
Trustee                                              and practicing private physician
Age: 67

ANTHONIE C. VAN EKRIS       Since 1999       19      Chairman of BALMAC International, Inc.              --
Trustee                                              (commodities and futures trading)
Age: 73




                                       18


GAMCO MATHERS FUND
ADDITIONAL FUND INFORMATION (CONTINUED) (UNAUDITED)
================================================================================


                            TERM OF
NAME, POSITION(S)         OFFICE AND
    ADDRESS(1)             LENGTH OF                                   PRINCIPAL OCCUPATION(S)
    AND AGE              TIME SERVED(2)                                DURING PAST FIVE YEARS
    -------              --------------                                ----------------------
OFFICERS:
- ---------
                                                
BRUCE N. ALPERT           Since 1999      Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since
Executive Vice President                  1988 and an officer of most of the registered investment companies in the Gabelli/GAMCO
Age: 56                                   Funds complex. Director and President of Gabelli Advisers, Inc. since 1998

EDITH L. COOK(4)          Since 1984      Vice President of GAMCO Mathers Fund since 1999
Vice President
Age: 66

HEIDI M. KOONTZ(4)        Since 1995      Vice President of GAMCO Mathers Fund since 1999
Vice President
Age: 39

JAMES E. MCKEE            Since 1999      Vice President, General Counsel, and Secretary of GAMCO Investors, Inc. since 1999
Vice President and                        and GAMCO Asset Management Inc. since 1993; Secretary of all of the registered
Secretary                                 investment companies in the Gabelli/GAMCO Funds complex
Age: 44

AGNES MULLADY             Since 2006      Vice President of Gabelli Funds, LLC since 2007; Officer of all of the registered
Treasurer                                 investment companies in the Gabelli/GAMCO Funds complex; Senior Vice President of
Age: 49                                   U.S. Trust Company, N.A. and Treasurer and Chief Financial Officer of Excelsior Funds
                                          from 2004 through 2005; Chief Financial Officer of AMIC Distribution Partners from
                                          2002 through 2004; Controller of Reserve Management Corporation and Reserve Partners,
                                          Inc. and Treasurer of Reserve Funds from 2000 through 2002

ANNE E. MORRISSY, CFA(4)  Since 1987      Executive Vice President of GAMCO Mathers Fund and Vice President of GAMCO
Executive Vice President                  Investors, Inc. since 1999
Age: 45

PETER D. GOLDSTEIN        Since 2004      Director of Regulatory Affairs at GAMCO Investors, Inc. since 2004; Chief Compliance
Chief Compliance Officer                  Officer of all of the registered investment companies in the Gabelli/GAMCO Funds
Age: 54                                   complex; Vice President of Goldman Sachs Asset Management from 2000 through 2004


- ----------------
  1 Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.
  2 Each Trustee will hold office for an  indefinite  term until the earliest of
    (i) the next  meeting of  shareholders,  if any,  called for the  purpose of
    considering  the  election  or  re-election  of such  Trustee  and until the
    election and qualification of his or her successor,  if any, elected at such
    meeting,  or (ii) the date a Trustee  resigns  or  retires,  or a Trustee is
    removed by the Board of Trustees or  shareholders,  in  accordance  with the
    Fund's By-Laws and  Declaration of Trust.  Each officer will hold office for
    an indefinite  term until the date he or she resigns or retires or until his
    or her successor is elected and qualified.
  3 "Interested person" of the Fund as defined in the 1940 Act. Messrs.  Gabelli
    and Van der Eb are each  considered an "interested  person" because of their
    affiliation  with  Gabelli  Funds,  LLC which acts as the Fund's  investment
    adviser.
  4 Address: 2801 Lakeside Drive, Suite 201, Bannockburn, IL 60015.
  5 This column includes only  directorships of companies  required to report to
    the SEC under the Securities  Exchange Act of 1934, as amended (i.e.  public
    companies) or other investment companies registered under the 1940 Act.
  6 Trustees who are not interested persons are considered "Independent"
    Trustees.


                                       19


                               GAMCO MATHERS 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            Anthony R. Pustorino
CHAIRMAN AND CHIEF               CERTIFIED PUBLIC ACCOUNTANT,
EXECUTIVE OFFICER                PROFESSOR EMERITUS
GAMCO INVESTORS, INC.            PACE UNIVERSITY

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

Anthony J. Colavita              Henry G. Van der Eb, CFA
ATTORNEY-AT-LAW                  PRESIDENT AND CHIEF
ANTHONY J. COLAVITA, P.C.        EXECUTIVE OFFICER
                                 GAMCO MATHERS FUND
Vincent D. Enright
FORMER SENIOR VICE PRESIDENT     Anthonie C. van Ekris
AND CHIEF FINANCIAL OFFICER      CHAIRMAN
KEYSPAN CORP.                    BALMAC INTERNATIONAL, INC.


                         OFFICERS AND PORTFOLIO MANAGER

Henry G. Van der Eb, CFA         Anne E. Morrissy, CFA
PRESIDENT AND                    EXECUTIVE VICE PRESIDENT
PORTFOLIO MANAGER
                                 Heidi M. Koontz
Bruce N. Alpert                  VICE PRESIDENT
EXECUTIVE VICE PRESIDENT
                                 Edith L. Cook
Agnes Mullady                    VICE PRESIDENT
TREASURER
                                 Peter D. Goldstein
James E. McKee                   CHIEF COMPLIANCE OFFICER
VICE PRESIDENT
AND SECRETARY

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

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

                                  LEGAL COUNSEL
                      Paul, Hastings, Janofsky & Walker LLP


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

GAB1726Q407SR



                                                                           GAMCO


                                                            GAMCO
                                                            MATHERS
                                                            FUND





                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 2007





ITEM 2. CODE OF ETHICS.

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

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

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


ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

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


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

AUDIT FEES

     (a) The  aggregate  fees  billed for each of the last two fiscal  years for
         professional  services  rendered by the  principal  accountant  for the
         audit of the registrant's annual financial  statements or services that
         are normally  provided by the  accountant in connection  with statutory
         and  regulatory  filings  or  engagements  for those  fiscal  years are
         $29,500 for 2006 and $30,700 for 2007.

AUDIT-RELATED FEES

     (b) The  aggregate  fees  billed in each of the last two  fiscal  years for
         assurance  and related  services by the principal  accountant  that are
         reasonably  related to the performance of the audit of the registrant's
         financial  statements and are not reported under  paragraph (a) of this
         Item are $0 for 2006 and $0 for 2007.


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 $3,900 for 2006 and $4,100
         for 2007.  Tax fees  represent  tax  compliance  services  provided  in
         connection with the review of the Registrant's tax returns.

ALL OTHER FEES

     (d) The  aggregate  fees  billed in each of the last two  fiscal  years for
         products and services provided by the principal accountant,  other than
         the services reported in paragraphs (a) through (c) of this Item are $0
         for 2006 and $0 for 2007.

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

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


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

                           (b) Not applicable

                           (c) 100%

                           (d) Not applicable

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


     (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 $100,900 for 2006 and $69,100 for 2007.

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



ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable.



ITEM 6. SCHEDULE OF INVESTMENTS.

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



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

Not applicable.



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

Not applicable.



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

Not applicable.


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

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


ITEM 11. CONTROLS AND PROCEDURES.

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


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


ITEM 12. EXHIBITS.

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

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

     (a)(3)   Not applicable.

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


                                   SIGNATURES

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

(registrant) The GAMCO Mathers Fund
             -------------------------------------------------------------------
By (Signature and Title)*  /s/ Henry G. Van der Eb
                         -------------------------------------------------------
                           Henry G. Van der Eb, Chief Executive Officer


Date     03/05/08
    ----------------------------------------------------------------------------


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/ Henry G. Van der Eb
                         -------------------------------------------------------
                           Henry G. Van der Eb, Chief Executive Officer


Date     03/05/08
    ----------------------------------------------------------------------------


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


Date     03/05/08
    ----------------------------------------------------------------------------



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