What are my chances of getting an NROTC scholarship?

I am wanting to get a NROTC scholarship to Georgia Tech, however I am open to going anywhere in the south. I am entering my Junior year of high school and currently have a 4.0 (I have yet to take the SAT or ACT). I am on the football team and a member of the beta club (not a very active member) and have just recently joined the National Society of High School Scholars. Are my grades and activities enough to make me competitive for a NROTC scholarship? If not, what else should I get involved in to better my chances?