Exhibit 1


CONFIRMING STATEMENT



This Statement confirms that the undersigned, Jennifer McManus,
has authorized and designated either Deborah A. Golden, Marland
O. Webb or Lisa M. Ibarra to execute and file on the
undersigneds behalf all Forms 3, 4 and 5 (including any
amendments thereto) that the undersigned may be required to file
with the U.S. Securities and Exchange Commission as a result of
the undersigneds ownership of or transactions in securities of
GATX Corporation.  The authority of Deborah A. Golden, Marland
O. Webb and Lisa M. Ibarra under this Statement shall continue
until the undersigned is no longer required to file Forms 3, 4
and 5 with regard to the undersigneds ownership of or
transactions in securities of GATX Corporation, unless earlier
revoked in writing.  The undersigned acknowledges that neither
Deborah A. Golden, Marland O. Webb, nor Lisa M. Ibarra is
assuming any of the undersigneds responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.



Date: January 2, 2020




/s/ Jennifer McManus
Jennifer McManus




 Golden, Marland O. Webb, nor Lisa M. Ibarra is
assuming any of the undersigneds responsibilities to comply with
Section 16 of the Securities E