/usr/share/myspell/dicts/gv-GB.aff is in myspell-gv 0.50-9.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/myspell/dicts/../../hunspell/gv_GB.aff
/usr/share/myspell/dicts/../../hunspell/gv_GB.aff