I think you're a little confused. Either that or your recruiter mislead you.
If you enlisted, you are not going to be an Apache gunner. Apache gunners double as Apache pilots (i.e. both the front and back seater are qualified pilots and gunners) and pilots in Army Aviation are commissioned officers or warrant officers. In order to be a pilot you would have to go through ROTC, OCS, West Point, or Warrant Officer Candidacy. The closest you will get on the enlisted side to Apaches is to be a crew chief (the E-5 to E-7 who is responsible for ensuring his assigned aircraft are maintained - he does not fly).
Did you enlist under the Ranger Contract? That means you will first go through Infantry BCT in Ft. Benning, GA and immediately following graduation will report to 75th Ranger Regiment for RIP.