What paper? I'm looking at the scholarship contract, and it says 2.0. CC Reg 145-1 (dated September 2011) says 2.0. If you've got something official that says something different I'm all ears.
Seems I remember a lot of folks talking about ROTC study hall if you got below 2.5 (unit specific I would think), but as with others - anything below a 3.0 is not where you want to be if you want to be very competitive within your unit.