/usr/lib/libgnustep-gui.so.0.20 is in libgnustep-gui0.20 0.20.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgnustep-gui.so.0.20.0
/usr/lib/libgnustep-gui.so.0.20.0