The Gatekeeper is the protector of the Realms in the Filthy Frank Omniverse. They are a being with no body. The gatekeeper seems to have weapons for sale, as seen in Loser reads Hater Comments 4. They are a living portal as seen when they gave the shotgun to Frank as mentioned before. Not much is known about this mysterious being. other than they are Frank's friend.
While most of his powers are unknown, those that have been presented by the gatekeeper consist of being able to summon sentient beings and prepare them for a task at will, as he did with Red Dick In TOILET SRIRACHA SHRIMP. The Gatekeeper is also capable of bringing physical objects through his portal at will, as presented when he saved Fake Frank's life in Realm 305 (The Hood Realm) When two Black gamblers ganged up on him with a knife by providing him with a shotgun, Giving Fake Frank the upper hand.