Exhibit 1

CONFIRMING STATEMENT



This Statement confirms that the undersigned, Shelley J. Bausch, has authorized
and designated Brian L. Glassberg, Alan R. Haguewood and 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
US Securities and Exchange Commission as a result of the undersigneds ownership
of or transactions in securities of GATX Corporation.  The authority of Brian
L. Glassberg, Alan R. Haguewood 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 Brian L. Glassberg, nor Alan R. Haguewood nor
Lisa M. Ibarra is assuming any of the undersigneds responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.




Date: June 12, 2023




/s/ Shelley J. Bausch
Shelley J. Bausch