Question

[maik]

how can i make a char with the name gm?

[MentaL]

[teacher4]

Dude...please, bother to check updates, the mangos and SDB people are really great guys who help us play, they deserve some effort!
The command is <.gmon>
This means that other players see your name as <GM>Yourname
You also cannot interact with players, not even inspect them. Mobs don't aggro you and if I remember correctly you can't aggro them. You'll see them as yellow faction.
If you type <.gmoff> you go back to normal player status (although you have all the Admin powers)