I have seen a few GTO's here in Phoenix, but this one had a different hood. It was a red 2004, but the hood was aftermarket. Don't think it was a mule ( they are common here for warm wearther testing ) or a 2005 and it wasn't covered like most of the test cars.
The hood was a dual scoop, in center of the hood, but with a large rise down the center. Not a banshee hood or the Monaro scoops from Australia. This was a little more sedate on the scoops, but the rise in the hood was what made it look different. My take is that they based it on an old GTO hood like this one:
So you just have to kind of imagine it I guess. No camera with me :-(
I think it worked well. It broke up an otherwise flat hood and really gave it an aggressive look, but not tacky.
The hood was a dual scoop, in center of the hood, but with a large rise down the center. Not a banshee hood or the Monaro scoops from Australia. This was a little more sedate on the scoops, but the rise in the hood was what made it look different. My take is that they based it on an old GTO hood like this one:

So you just have to kind of imagine it I guess. No camera with me :-(
I think it worked well. It broke up an otherwise flat hood and really gave it an aggressive look, but not tacky.