Is the Zuma GM actually looking for help? If so, it's very subtle.
What, did you expect him to be posting want ads?
GM isn't exactly a job that gets advertised for publicly. It's a highly sensitive position, and only people who have proven themselves to Tom—at least to some extent—will even be considered for it.
Even that doesn't always work to weed out the trolls. Remember Prudent in the Fourth Invasion? Talking about teleporter arrays, orbital cannons, and whatnot?