I would like know if it's possible to set the gnome desktop so that only user's that are part of a group can use gnome desktop. So for example the users by default can use only text mode, unless I change the permissions for the user. In other word's: when users login to the computer, he only gets text mode. If the administrator gives him the permissions to use the desktop, then after login he can use the gnome desktop.

I hope you can understand waht I would like to do.

Greetings Jure