/usr/share/help/gl/ is in gnome-music 3.18.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/gl/gnome-music/
/usr/share/help/gl/gnome-music/figures/
/usr/share/help/gl/gnome-music/figures/gnome-music-3.12.png
/usr/share/help/gl/gnome-music/index.page
/usr/share/help/gl/gnome-music/introduction.page
/usr/share/help/gl/gnome-music/legal.xml
/usr/share/help/gl/gnome-music/play-music.page
/usr/share/help/gl/gnome-music/playlist-create-albums.page
/usr/share/help/gl/gnome-music/playlist-create-artists.page
/usr/share/help/gl/gnome-music/playlist-create-songs.page
/usr/share/help/gl/gnome-music/playlist-delete.page
/usr/share/help/gl/gnome-music/playlist-remove-songs.page
/usr/share/help/gl/gnome-music/playlist-repeat.page
/usr/share/help/gl/gnome-music/playlist-shuffle.page
/usr/share/help/gl/gnome-music/search.page