why are so much gdm processes are running?

[Richard Ryniker]

It is interesting to note a difference from F21, where the login
processes are "true" daemons in the sense they have no controlling
terminal.  Now, for example, joachim.backes at rhrk.uni-kl.de reports:

 ps -u gdm
  PID TTY          TIME CMD
 1243 ?        00:00:00 systemd
 1244 ?        00:00:00 (sd-pam)
 1246 tty1     00:00:00 gdm-wayland-ses
 1248 tty1     00:00:00 dbus-daemon
 1249 tty1     00:00:00 gnome-session
 1319 tty1     00:00:02 gnome-shell
 ...

Does this make possible new security issues? I do not claim it does, but
do not know enough to assert it does not.