<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF GARTNER GROUP, INC. FOR THE PERIOD ENDED SEPTEMBER 30,
2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<CASH> 61,698
<SECURITIES> 35,404
<RECEIVABLES> 326,359
<ALLOWANCES> 5,004
<INVENTORY> 0
<CURRENT-ASSETS> 512,868
<PP&E> 188,921
<DEPRECIATION> 97,662
<TOTAL-ASSETS> 1,002,965
<CURRENT-LIABILITIES> 587,339
<BONDS> 0
0
0
<COMMON> 59
<OTHER-SE> 74,761
<TOTAL-LIABILITY-AND-EQUITY> 1,002,965
<SALES> 858,671
<TOTAL-REVENUES> 858,671
<CGS> 398,773
<TOTAL-COSTS> 398,773
<OTHER-EXPENSES> 411,688
<LOSS-PROVISION> 4,256
<INTEREST-EXPENSE> 24,900
<INCOME-PRETAX> 56,101
<INCOME-TAX> 28,826
<INCOME-CONTINUING> 27,275
<DISCONTINUED> 0
<EXTRAORDINARY> 1,729
<CHANGES> 0
<NET-INCOME> 25,546
<EPS-BASIC> 0.29<F1>
<EPS-DILUTED> 0.29
<FN>
<F1>Amount reported is EPS-BASIC
</FN>
</TABLE>