MapGenie interactive map:

https://mapgenie.io/grand-theft-auto

WikiGTA interactive map:

http://en.wikigta.org/wiki/Map_Gangsta_Bang_(Grand_Theft_Auto)

Steam Guide:

https://steamcommunity.com/sharedfiles/filedetails/?id=415301938

Sketchfab 3D model:

https://skfb.ly/orUIU

GBC version maps:

https://www.spriters-resource.com/game_boy_gbc/grandtheftauto/