/usr/share/GNUstep/debian/application.install.in is in gnustep-make 2.6.2-2.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | @GNUSTEP_SYSTEM_APPS@/@APPLICATION@.app
@GNUSTEP_SYSTEM_TOOLS@/@APPLICATION@
|