Gamergate is physically identical to the other members of the Ant Nation. However, he wears a green peaked cap that symbolizes his rank as an officer in the colony. The green peaked cap has a symbol of a tooth on it.
The lieutenant's name likely refers to gamergates, which are female worker ants that are capable of reproducing with male ants in a colony that lacks a queen.
It is unlikely that his name refers to the online controversy known as Gamergate.