GoCity is the City of GoAnimate, and is located in Darkenshroom.
In the Fanon
Due to the instability and the Immaturity in the City because of the immature GoAnimators, Several people left GoCity and went to Community City. Igor was one of those people who moved.
There is a Fanfic (Immature Strike! GoCitzens Invade Community City!) where the GoAnimators attack.
YutaAsahina and NagisaShingetsu left the along to ditch an evil clan they used to be in called "swastika". There was a disconnected bridge that Yuta and Nagisa jump through at the edge of the city that led to an exit.