/usr/lib/ghc-doc/hoogle/gd.txt is in libghc-gd-doc 3000.7.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gd-doc/html/gd.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-gd-doc/html/gd.txt