Never ordered from Gamestop before, what are they like with delivery schedules and the like?
Not sure if you're having them ship it to you.
My local GameStop will usually do a midnight release of major games. I anticipate this to happen for DA:I since they did it for DA2, so I'll be going up to the store around 11pm Monday, October 6th to "finalize" my order (basically, they check off your pre-order receipt or you finish paying off the game if you had only done the $5 reservation to hold it) and then hang around with the other fans until midnight officially rings and I can go home with my physical copy.