I am repeating the claims of the drone pilots, they simply call it GA.
I doubt that they have the full picture.
The area they call GA on the western side stretches a long way with many loading docks.
If we get loading docks on the east side that might be Model Y GA. My original assumption matches yours, the maps the drome pilots put up have GA on the western side.
My thoughts:Another consideration is with castings and a structural pack, the process flow might be different. The structural pack being married to the castings before the regular body shop process.
If that was the case I imagine at Austin, that marriage would happen south of the castings area, but before the body shop zipper.
I am not sure if that impacts on Model Y GA being on the east side.
South east is stamping (big pit), north east corner is casting. Between the two is body assembly (welding by stamping, casting bolt on by casting). Then shift (sideways or new floor) to paint. Line flow then goes south through GA (not the state, that's east). Whole thing could fit in the east half of the building.
No loading docks on east side due to the machinery and processes being all raw metal fed in from north and south ends. West side is recieving/ warehouse(on some level).
Centerline is an acces road that could feed both sides:
https://mobile.twitter.com/elonmusk/status/1307780443157258240There’ll be lots of green space around factory, but building itself is continuous. The “open” areas inside are covered. They’re internal semi truck roads inside a giant monolithic building.
Subassembilies likely on the upper floors and feed to the line on the ground floor.