/usr/share/hunspell/gv_GB.aff is in myspell-gv 0.50-11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # minimal myspell affix file for Manx Gaelic
# Copyright (C) 2003 Alastair McKinstry, <mckinstry@debian.org>
# Released under the GPL.
#
SET ISO8859-1
TRY abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
|