The Xsession file installed and used by net-misc/x2goserver (/etc/x2go/Xsession)
calls xmodmap and setxkbmap to setup the session keyboard, but
net-misc/x2goserver does not RDEPEND on x11-apps/xmodmap and x11-apps/setxkbmap
so they might not be installed on the server system.
In this case, the keyboard settings inside a x2go session will be wrong.
That's why net-misc/x2goserver should RDEPEND on x11-apps/xmodmap and
x11-apps/setxkbmap so the session keyboard is configured correctly.
For similar reasons, the package possibly should also RDEPEND on x11-apps/xrdb.
However, a missing xrdb usually causes no obvious problems.
/usr/bin/x2gosetkeyboard also calls setxkbmap.