/usr/share/GNUstep/ is in gnustep-back-common 0.26.2-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/GNUstep/Documentation/
/usr/share/GNUstep/Documentation/Developer/
/usr/share/GNUstep/Documentation/Developer/Back/
/usr/share/GNUstep/Documentation/Developer/Back/General/
/usr/share/GNUstep/Documentation/Developer/Back/General/Back.html
/usr/share/GNUstep/Documentation/Developer/Back/General/DefaultsSummary.html
/usr/share/GNUstep/Documentation/Developer/Back/General/General.igsdoc
/usr/share/GNUstep/Documentation/Developer/Back/General/WindowFocus.html
/usr/share/GNUstep/Documentation/Developer/Back/General/dependencies
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.26.2/
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.26.2/ANNOUNCE
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.26.2/INSTALL
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.26.2/NEWS
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.26.2/README