German keyboard support for gdm???

[Peter Ulrich Kruppa]

Hello,

does anyone know how to make gnome's display manager gdm understand german
keyboard input?
I can find many discussions, hints and ideas in the web, but whatever I
try, gdm stubbornly insists on using en_US default keyboard.

I am running gdm-3.16.4_3 from ports on FreeBSD 11.1-RELEASE amd64 .
My german keyboard is supported on console and "inside" Gnome 3 , but not
on gdm's username/password dialog.

Thanks an greetings

Peter