GMs are required to take a SORC Assessment, which upon passing, grants their account GM references. Passing the GM Assessment also updates their account to a GM profile. For example, a player display name in tbis manner:
Player SirnamePC
Upon passing the GM assessment, GMs will gsve the following tag:
Game MasterGM
Sir names are optional and can be included as a space-separated second name. Each user is uniquely identified by a hidden id (shown here as data-uid) for online features, so display names may be the same, but user ids will always remain unique.

On top of directing campaigns, GMs can also play as characters.