Grand Theft Auto Universe

this is the setting of all games in the series this universe is like are own the cities ar the same but there are a lot of diffrences

see Grand Theft Auto World at Grand Theft Wiki

Places in the Grand Theft Auto Universe

differences between #1/#2 and #3 era

the GTA Universe in GTA eras #1 and #2 are considered non-canon to the 3rd Era. reasons include, completely different geography copared to the same places in #3 and gangs that don't exist in #3 history (ie. #1s "the Scientists").