<PAGE> PAGE 1
000 A000000 06/30/98
000 C000000 0000811789
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 DREYFUS BASIC GNMA FUND
001 B000000 811-5074
001 C000000 2129226822
002 A000000 200 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10166
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
018 000000 Y
019 A000000 Y
019 B000000 160
019 C000000 DREYFUSFAM
062 A000000 Y
062 B000000 0.2
062 C000000 0.0
062 D000000 0.7
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 89.2
062 O000000 0.0
062 P000000 43.9
062 Q000000 0.0
062 R000000 0.0
071 A000000 252091
071 B000000 222641
071 C000000 100295
071 D000000 222
072 A000000 6
074 N000000 133913
074 T000000 87365
<PAGE> PAGE 2
075 A000000 0
075 B000000 82327
077 A000000 Y
SIGNATURE MICHAEL S. PETRUCELLI
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000811789
<NAME> DREFUS BASIC GNMA FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 116052
<INVESTMENTS-AT-VALUE> 117038
<RECEIVABLES> 16114
<ASSETS-OTHER> 761
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 133913
<PAYABLE-FOR-SECURITIES> 46119
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 429
<TOTAL-LIABILITIES> 46548
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 85375
<SHARES-COMMON-STOCK> 5642
<SHARES-COMMON-PRIOR> 4955
<ACCUMULATED-NII-CURRENT> 2
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1066
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 922
<NET-ASSETS> 87365
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2873
<OTHER-INCOME> 0
<EXPENSES-NET> 275
<NET-INVESTMENT-INCOME> 2598
<REALIZED-GAINS-CURRENT> 771
<APPREC-INCREASE-CURRENT> 68
<NET-CHANGE-FROM-OPS> 3437
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2598)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1308
<NUMBER-OF-SHARES-REDEEMED> (745)
<SHARES-REINVESTED> 124
<NET-CHANGE-IN-ASSETS> 11435
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 297
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 245
<INTEREST-EXPENSE> 10
<GROSS-EXPENSE> 447
<AVERAGE-NET-ASSETS> 82327
<PER-SHARE-NAV-BEGIN> 15.32
<PER-SHARE-NII> .49
<PER-SHARE-GAIN-APPREC> .17
<PER-SHARE-DIVIDEND> (.49)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.49
<EXPENSE-RATIO> .007
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>