/usr/share/doc/libgck-1-dev/changelog.Debian.gz is in libgck-1-dev 3.2.2-2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgck-1-dev/../libgck-1-0/changelog.Debian.gz
/usr/share/doc/libgck-1-dev/../libgck-1-0/changelog.Debian.gz