Cannot open X display `(null)'. **** Unable to open the initial device, quitting

input: gs myPSFile.ps output: GPL Ghostscript 9.50 (2019-10-15) Copyright (C) 2019 Artifex Software, Inc. All rights reserved. This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY: see the file COPYING for details. GPL Ghostscript 9.50: Cannot open X display `(null)'. **** Unable to open the initial device, quitting. why? I have windows 10. I'm using git bash to ssh into my school's internal tux server. What I tried: I saw 3 or 4 other duplicate questions on many other sites. I have no idea what is going on.