Air Guard enlisted to Air Force Officer?

I've been talking to an Air Guard recruiter and I've been set up to enlist in about a week. I got a 98 on the ASVAB and ped the physical very well. I will have completed two years of college when I leave for training (six year contract). My goal is to go from Air Guard to active duty Air Force as an officer after I graduate. I've heard a lot of stuff about how hard it is to go from Air Guard to Air Force active. But, I talked to an Air Force recruiter and she said that if I get accepted for OTS, the guard has to release me for that if the OTS exception is in my contract. Is this true? (btw, she had no reason to lie to me cuz she wasn't going to recruit me) My degree will be a BS in Geographic Information Systems (a geo-spatial science). If I had a gpa over 3.5, and having served in the Air Guard for several years, would my chances for being accepted to AFOTS be good? Thanks