stickskiOff the top of my head I think you need like a 2.0 and a 16 ACT. Basically you need a pulse. If you can't get in, you shouldn't go to college haha. Good Luck!
When I applied I think these were the requirements for your application to be considered in the first place.
I applied in the summer of 2012. You didn't need an essay for the main application, but I think one was required for the Honors College app. I was told by some friends the next year that an essay was required. I just finished my second year with a 3.8, I think I applied with a high school GPA of 3.9.
As mentioned above, it's not incredibly exclusive, by any means. I think I heard somewhere that there are 30,000 full-time students (from all classes), but I could be wrong.