/etc/gimp/2.0/menurc is in gimp-data 2.8.22-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ; gimp GtkAccelMap rc-file -*- scheme -*-
;
(gtk_accel_path "<Actions>/plug-in/file-print-gtk" "<Primary>p")
|