If you haven't downloaded and added any missions to your game yet, then the Gamemaster console will only work in "Mission Mode" (not Invasion Mode) and only if you are playing the "Module_3" mission included with the game.
If you go to Artemis/dat/missions/Module_3/module-doc.txt, you will see a list of the GM commands.
When you are ready to download and add missions to the game, some people upload modules with GM commands and some people don't. For each mission that allows GM commands, those commands will be different and you'll need to print out the text file for your Gamemaster to reference during play.
Daredevil Cosmic Cowboys, TNS Hyperion, Weapons Officer
1st Fleet of Southern California Sector.