Do Native American Activity's contribute to US GDP?

[Joe]

Yesterday I was visiting a friend in college. She had to go to class so I said I would join her. One of the question's asked in the class was:

Are Native American casino's counted in US GDP?

I think the answer is yes, the teacher did not know the answer. What do you guys think?

 

[JimmyJam]

My first instinct would have to be to say "NO", but here's an in-depth article from Wikipedia, it sounds kinda complicated and confusing (much like the whole situation)

Native American Gambling Enterprises

JJ