My first thought was import. Possibly had the rear bumper replaced for any one of a million reasons.
Regarding the wheels, the Rays were an optional extra pre-facelift (I think, may have been up to the HR though), so not all early GT's came with them (later they became standard as part of the GT package though). Could also be that the owner's swapped out the seats, of course, and it's not a GT at all...