PAGE  1
000 A000000 06/30/2005
000 C000000 0000845611
000 D000000 N
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000 F000000 Y
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000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 THE GABELLI CONVERTIBLE & INCOME SEC FUND INC
001 B000000 811-05715
001 C000000 9149215100
002 A000000 ONE CORPORATE CENTER
002 B000000 RYE
002 C000000 NY
002 D010000 10580
002 D020000 1422
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004  000000 N
005  000000 N
006  000000 N
007 A000000 N
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007 C011000 10
008 A000001 GABELLI FUNDS, LLC
008 B000001 A
008 C000001 801-37706
008 D010001 RYE
008 D020001 NY
008 D030001 10580
008 D040001 1422
010 A000001 GABELLI FUNDS, LLC
010 B000001 801-37706
010 C010001 RYE
010 C020001 NY
010 C030001 10580
010 C040001 1422
010 A000002 PFPC INC.
010 C010002 WILMINGTON
010 C020002 DE
010 C030002 19809
012 A000001 EQUISERVE TRUST CO., N.A.
      PAGE  2
012 B000001 84-5601
012 C010001 CANTON
012 C020001 MA
012 C030001 02021
013 A000001 PRICEWATERHOUSECOOPERS LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10017
014 A000001 GABELLI & COMPANY, INC.
014 B000001 8-21373
014 A000002 GABELLI DIRECT INC.
014 B000002 8-37104
014 A000003 GABELLI FIXED INCOME DISTRIBUTORS INC.
014 B000003 8-38568
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02110
015 E010001 X
018  000000 Y
019 A000000 Y
019 B000000   28
019 C000000 GABELLIGRP
020 A000001 GABELLI & COMPANY, INC.
020 B000001 13-2885006
020 C000001     35
020 A000002 ALLEN & CO., INC.
020 B000002 13-6176976
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022 A000001 HSBC SECURITIES, INC.
022 B000001 13-2650272
022 C000001    108017
022 D000001     19256
022 A000002 CLARKE (G.X.) & CO.
022 B000002 13-2969143
022 C000002     28260
022 D000002      5141
022 A000003 BARCLAYS GLOBAL INVESTORS
022 B000003 94-3112180
022 C000003      6586
022 D000003         0
      PAGE  3
022 A000004 SALOMON SMITH BARNEY, INC.
022 B000004 11-2418191
022 C000004      3082
022 D000004         0
022 A000005 BEAR STEARNS & CO., INC.
022 B000005 13-3299429
022 C000005      1275
022 D000005      1309
022 A000006 DEUTSCH BANK SECURITIES, INC.
022 B000006 13-2730828
022 C000006      2551
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022 A000007 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
022 B000007 13-5674085
022 C000007      1727
022 D000007       399
022 A000008 CIBC WOOD MARKETS, INC.
022 B000008 13-2798343
022 C000008      1281
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022 A000009 FIRST ALBANY CAPITAL, INC.
022 B000009 14-1391446
022 C000009       580
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022 A000010 GOLDMAN SACHS & CO.
022 B000010 13-5108880
022 C000010         0
022 D000010       480
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      PAGE  4
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      PAGE  5
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      PAGE  6
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      PAGE  7
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      PAGE  8
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      PAGE  9
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087 A010000 COMMON STOCK
087 A020000 36240B109
087 A030000 GCV
087 B010000 6.00% SERIES B CUMULATIVE PREFERRED STOCK
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087 B030000 GCVPRB
088 A000000 N
088 B000000 N
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SIGNATURE   BRUCE N ALPERT                               
TITLE       PRESIDENT &TREASURER