GMs that have voulenteered so far have just been you and I, Peri. And unless anybody objects to giving us any modicum of power regarding the RP, I guess that makes us the GMs.
As for rules, I'd like to submit this draft.
0. Don't be a dick. Just a basic rule of thumb, meaning just don't do anything that is meant to specifically hurt other players or ruin their experience.
1. Keep it clean. This is a SFW board, anything sexy, gory, or otherwise NSFW goes under a spoiler.
2. No powergaming. Don't play to win, don't make your character a god, and don't overpower your weapons or ship.
3. No metagaming. Your character only knows as much as they've learned in the world.
4. Be nice in OOC. Just don't be a dick to other players. In IC, being mean is fine, just don't go too far overboard (i.e. mass murder).
5. Have fun! Yes, this is a rule. If you break it, you are banned FOREVER. Not really though.
I wrote that up in about two minutes, lemme know if I need to add anything.
Well, those weapons and ships have to get past two gms, sooo.... Also, liking those rules, but you forgot vulnus.