Has anyone worked out where the six regions actually sit relative to each other

We know the names. What I have not seen is a defensible layout.

Keys are south, obviously. Mount Kalaga is described as being on the state's northern border. Vice City is the anchor. That leaves Grassrivers, Port Gellhorn and Ambrosia to place, and the descriptions give us wetlands, a forgotten coast, and inland industrial.

So Grassrivers is probably west or inland of the city, Port Gellhorn is coastal but not the same coast, and Ambrosia is inland. That is my read. Poke holes in it.