When you are creating their account, you can give them status 255 which is full GM rights:
Since I'm not at home I can not give you the data table name you, but it's something UserMaster table.
Watch this video from Ariez on how to create dummy accounts in SQL, it's the 2nd data table you have to open up:
There are two tables you need to open up. Just simply edit the name and add the [GS] or [GM] infront of their name.
This alone will not give the player account GM rights, you will need to change the player Status to 255 to give them full GM rights (If you need to know where, you can PM me - when I get home and look into the data table I will answer your PM with the exact location).
(I found this information with Ariez and KillSteal's help).
