That car is gorgeous. Paint is pretty tacky and so are the rims, but those are easy fixes.
This isn't a GT-R though. GT-Rs have the RB26DETT twin turbo engine in them, this has an RB20, not to mention it's an automatic (GT-Rs are manual only) and the Brembos aren't authentic.
Probably a good idea not to pick it up, better to wait for the real GT-R and not risk cops impounding it.
The 300zx is alright but I much prefer the Supra. If you're looking to max out the engine I believe the Supra is the go-to car, with the manual transmission you can take the HP numbers sky high on that thing and have ease of mind behind the wheel.