Check the Paradox Forums, seeing as how World in Revolution (A RP dedicated to the GM running stats) lasted well over a year with each thread. Your issue is you obviously have no trust within the GM to be mature and not abuse his own roleplay for some minor egotistical gain. The obvious solution is, have one GM and perhaps 1-2 Co-GMs and ensure that the GM posts the math for each players stats. This way everything is out in the open and there is a balance to prevent corruption. That is how they did in WiR with 'yearly' updates showing every stat and the math behind it.