Every state has different prep op rules. In my state (it is a very new program for us) there is no minimum score. What I would try is to look on your state USAG site, and see if they have any information on there about the prep op program, or generally about qualification to states for all levels/programs. Some states have this up. Try googling your state + USAG, site should come up.
In NH it's 32, but as mentioned, every state is going to be different, and you're gym may even require higher than what the state does. Good luck in your new gym, hope you enjoy the experience!!!!