You're going to have to be more specific with what you want the GMs to do.
That would be cool like, when con was in the plaza bashing laanx, if laanx suddenly appeared infront of con, and said something like "So, you wish to take my power, mortal?... try it."
And then everyone would instantly have more fearful respect for laanx once laanx laid down the law... thus some people would be inspired to make a laanx follower guild and in a way re-create the vespers... and then maybe more new comers would become better rpers... yay!.... all that from the gms help by showing that the previously thought impossible is possible, like laanx actually appearing... im sure a gm can change their name to laanx, use a male lemur model, and boost their stats, and then appear infront of con... its easy...
GMs should join rps that deal with the law, or gods... and they need to be big, how big? like when a crowd is gathered, then the law/gods need to take action to defend themselves.