Just purchased an 06 metallic graphite 6MT sedan. I was lucky to find this car in this condition. One owner, 108k miles, little wear on the leather. I've scoured the auto for the dealership paper they would stick on the window that reads about the options, trim level etc. I debadged the trunk of that unsightly Infiniti lettering, and the G badge. My cluster reads REV I located the section in the OM that it's an electronic gate to keep drivers from accidentally shifting in reverse, while moving foreward. I read on a thread that REV indicates i have the rev up VQ. Redline starts @ 7k. I know it's definitely not a X trim since i have a standard trans. Interior package looks to be the premium one, reclining rear seats, Bose HU. It doesn't have navi though. Do i own a sport trim sedan?

Yes, you have the premium package, Not a "sport trim sedan" (dunno if there is such thing), yet one that does have factory "sport tuned suspension".
REV is a programmable shift light, you have to set it up by toggling the trip odometer button.