User blog comment:Yami riku/The Reality of Being a Global Moderator for Town of Salem/@comment-25876622-20171011002057

Basically, they are regular forum mods as on this wiki + some trial system organization? To be fair, "global" does make it sound more important. Also, the shorthand GM usually stands for game master, who can often take direct action in a multiplayer online game and are sometimes paid employees (unlike ToS GMs).