EXHIBIT 99.1



            GARTNER TO CONVERT $300 MILLION OF NOTES TO COMMON STOCK

     - ACTION WILL REDUCE DEBT TO ZERO, FURTHER STRENGTHENING BALANCE SHEET
                 WITH NO IMPACT ON REPORTED EARNINGS PER SHARE -

STAMFORD, Conn., Sept. 19, 2003-- Gartner, Inc. (NYSE: IT and ITB) ("Gartner" or
the "Company"), the world's leading technology research and advisory firm, today
said it has been notified by Silver Lake Partners ("SLP") and other noteholders
of their decision to convert into Gartner's class A common stock the $300
million face amount of 6% convertible subordinated notes issued to them by
Gartner in April 2000.

Converting the notes into common shares will reduce Gartner's debt to zero and
further strengthen its balance sheet without having any impact on the Company's
reported earnings per share. The notes will be converted into approximately 49
million common shares, which underlying shares have been previously included in
Gartner's fully diluted share count used for earnings per share calculations.

Michael D. Fleisher, Chairman and Chief Executive Officer of Gartner, said: "We
are very pleased that Silver Lake Partners has elected to convert the notes to
stock, underscoring our shared commitment to value creation. Conversion will
place us in a very strong financial position with a debt-free balance sheet,
$167 million in cash, and significant free cash flow, which totaled $90 million
over the past twelve months."

Completion of the conversion process is subject to compliance with applicable
regulatory requirements, including Hart-Scott-Rodino review, compliance with
contractual provisions, and satisfaction of New York Stock Exchange listing
requirements.

ABOUT GARTNER
Gartner, Inc. is a research and advisory firm that helps more than 10,000
clients leverage technology to achieve business success. Gartner's businesses
are Research, Consulting, Measurement, Events and Executive Programs. Founded in
1979, Gartner is headquartered in Stamford, Conn., and has more than 3,800
associates, including approximately 1,000 research analysts and consultants, in
more than 75 locations worldwide. Revenue for calendar year 2002 totaled $888
million. For more information, visit www.gartner.com.

SAFE HARBOR STATEMENT
This press release contains statements regarding the conversion of the notes
held by SLP and others and the future financial condition of Gartner as a result
of the conversion of the notes. These statements and all other statements in
this release other than the recitation of historical facts are forward-looking
statements (as defined in the Private Securities Litigation Reform Act of 1995).
Such forward-looking statements include risks and uncertainties; consequently,
actual results or events may differ materially from those expressed or implied
thereby. Factors that



could cause actual results or events to differ materially from the
forward-looking statements set forth herein include, but are not limited to: a
change in the noteholders' determination to convert the notes; legal and other
considerations; and Gartner's ability to capitalize on the reduction of its
outstanding debt. Forward-looking statements included herein speak only as of
the date hereof and Gartner disclaims any obligation to revise or update such
statements to reflect events or circumstances after the date hereof or to
reflect the occurrence of unanticipated events or circumstances. Other risks may
be found in Gartner's reports filed from time to time with the Securities and
Exchange Commission, including the Company's Transitional Report on Form 10-KT
for the three-month transitional period ended December 31, 2002. These filings
can be found on Gartner's Web site at www.gartner.com/investors and the SEC's
Web site at www.sec.gov.

Investor Contact:
Heather McConnell
Vice President, Investor Relations
+1 203 316 6768
heather.mcconnell@gartner.com
www.gartner.com/investors

Media Contact:
Roy Winnick
Kekst and Company
+1-212-521-4842
roy-winnick@kekst.com