German keyboard support for gdm???

[Ralf Mardorf]

On Sat, 2018-02-03 at 05:01 +0100, Ralf Mardorf wrote:
> Perhaps https://wiki.archlinux.org/index.php/GDM#Keyboard_layout does
> help, but I would stay away from a GUI to change the appropriate
> setting/s.
> 
> I once provided a short example how to use gsettings for the dconf crap,
> see
> https://mail.gnome.org/archives/evolution-list/2017-October/msg00110.html ,
> just use GDM insteadof evolution related keywords for the grep pipe.

Perhaps it isn't a dconf setting, but the config might be located in
/etc/gdm3/ , IOW take a look using an editor and/or consider to send a
request to a GNOME mailing list.