2006 Grand Prix - Base Model or GT?

[JalapenoChips]

Good evening, I recently bought a 2006 Grand Prix, which I use to get myself to and from school and work.
Upon buying it, the owner (who was the mother of the kid who used to drive it), and I thought that it was a GT model. However, I recently noticed that GT models should have a GT badge on the trunk lid, and my car doesn't.
Here are some details about the car:

-Non-supercharged V6 engine
-Black leather interior
-Electric sunroof
-Steering wheel radio controls
-Monsoon head unit & audio system
-The steering wheel cap has the triangular Pontiac logo, not the 'GP' cap
*Edit: I'm not sure what rims the car came with originally, it only came with black steelies when I bought it

I tried doing some research myself, and didn't come to much of a conclusion. Results on the web weren't helping me answer much, and I put my VIN into 6 different sites, 5 of which wouldn't tell me the trim and the 6th told me I had a base model.
So did I buy a GT that is simply missing the GT badge, or do I have loaded Base Model Grand Prix? I'm hoping someone who knows a lot more about this stuff can help me out here.
I can provide more little details about the car if necessary.
Thanks a bunch guys!

 

[melsg5]

Does it have a single exhaust in the back or two, GT is two.

 

[JalapenoChips]

Two mufflers in the back.

The car has been in an accident in its life, so it's possible that it doesn't have the original trunk lid.

 

[Tcang]

Loved my new 2006 GT. Base GP had steelies, but you could option it ala carte with what you wanted.