/usr/share/gedit/ is in gedit-plugins 3.18.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gedit/plugins/
/usr/share/gedit/plugins/colorschemer/
/usr/share/gedit/plugins/colorschemer/ui/
/usr/share/gedit/plugins/colorschemer/ui/schemer.ui
/usr/share/gedit/plugins/commander/
/usr/share/gedit/plugins/commander/modules/
/usr/share/gedit/plugins/commander/modules/align.py
/usr/share/gedit/plugins/commander/modules/bookmark.py
/usr/share/gedit/plugins/commander/modules/doc.py
/usr/share/gedit/plugins/commander/modules/edit.py
/usr/share/gedit/plugins/commander/modules/find/
/usr/share/gedit/plugins/commander/modules/find/__init__.py
/usr/share/gedit/plugins/commander/modules/find/finder.py
/usr/share/gedit/plugins/commander/modules/find/regex.py
/usr/share/gedit/plugins/commander/modules/format.py
/usr/share/gedit/plugins/commander/modules/goto.py
/usr/share/gedit/plugins/commander/modules/grep.py
/usr/share/gedit/plugins/commander/modules/help.py
/usr/share/gedit/plugins/commander/modules/move.py
/usr/share/gedit/plugins/commander/modules/reload.py
/usr/share/gedit/plugins/commander/modules/set.py
/usr/share/gedit/plugins/commander/modules/shell.py