/usr/lib/GNUstep/ is in gnustep-back0.22-art 0.22.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/GNUstep/Bundles/
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/libgnustep-art-022
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/English.lproj/
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/English.lproj/nfontFaceNames.strings
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/Info-gnustep.plist
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/Swedish.lproj/
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/Resources/Swedish.lproj/nfontFaceNames.strings
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/stamp.make
/usr/lib/GNUstep/Bundles/libgnustep-art-022.bundle/libgnustep-back-022