GTA Fan Creates Huge GTA 6 Map Based on Leaks

Fans continue to speculate what the open world of the next GTA would look like. Reddit user ‘tusstaster’ has published his concept map of the upcoming title, based on footage from the GTA 6 leak.

There are countless Cities/Towns such as York Town, Red Hill, etc found in the files. Most of these locations point towards north of Port Gelhorn, making the map expand even further north.

GTA 6 has a couple of islands, lakes and even mountains in addition to Vice City and smaller settlements on the fan map. It's significantly larger than GTA 5's map.
Does it look realistic?