Guys... first off, stop basing any ideas of a GMG faction on the old proposal... it had only so much to do with actual GMG lore, with most things either overexaggerated or made up.
It's easy to overestimate what the guild can, cannot or will not do. The GMG wields primarily political power (NOT military), due to their control of most of the H-Fuel going into Sirius. Their security division is comprised of highly trained and very dangerous pilots, but if they ever lost the support of Kusari and Kishiro, they would be ripe for destruction by pretty much anyone. Being a GMG would mean an approach that is very much similar to that of the Junker Congress. Most stuff would involve shady deals and perhaps even backstabbings, and forum RP would have to play a major role in the faction.
I cannot stress this enough: being a GMG is far from straight forward. You have masses of factions to deal with and you need to know your diplomacy to each and every one of them, diplomacy that frequently consists of much more than "hostile" or "friendly". The GMG uses *no* capital ships at all. Gunboats is the biggest they can get. Their security flies purely fighters and bombers.
If you lot needs help with this, I'm willing to help. Still have a GMG transport, fighter and bomber, so yeah.