Forum:GTA Canons?

From Grand Theft Auto Vice City Stories to GTA III, and everything in between, is canon. I'm not sure, and correct if I'm wrong but GTA1 and GTA2 are not canon. Is GTA London 1961 and GTA London 1969 canon with each other? The protagonists are the same so could anyone tell me if that's right?

Also, El Burro appears in GTA1 and GTAIII right? But there is no connection, no?