/usr/share/doc/libgd2-xpm-dev/README.gz is in libgd2-xpm-dev 2.0.36~rc1~dfsg-6ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgd2-xpm-dev/../libgd2-xpm/README.gz
/usr/share/doc/libgd2-xpm-dev/../libgd2-xpm/README.gz