/usr/share/doc/gir1.2-gdl-3/changelog.Debian.gz is in gir1.2-gdl-3 3.8.1-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gir1.2-gdl-3/../libgdl-3-5/changelog.Debian.gz
/usr/share/doc/gir1.2-gdl-3/../libgdl-3-5/changelog.Debian.gz