/usr/share/doc/libgs-dev/NEWS.Debian.gz is in libgs-dev 9.22~dfsg+1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgs-dev/../libgs9/NEWS.Debian.gz
/usr/share/doc/libgs-dev/../libgs9/NEWS.Debian.gz