/char off
in chat
I will look for a GM command list for you and post it ITT.
Good luck
edit.
These are from ZeroSignal's post.
Character On/Off:
/char on
/char off
Attack On/Off:
/attack on
/attack off
Summon Player:
/asummon <PlayerName>
Move to Player:
/amove <PlayerName>
Country Move:
/cmove <MapID>
Get Item:
/getitem <ItemType> <ItemTypeID> <ItemCount>
Monster Make:
/mmake <MobID>
Monster Erase Target:
/mera t
Announcement:
/notice "Some Message"
Check out his post it will get you started.