PG means Perfect Game, Mank.
PG Website
They identify themselves as being for the hs player.
Although I believe in attending a showcase early (in the freshman or sophomore year) to get to know how they work and to get rid of any potential nerves, I think your time and money would be better spent on either individual coaching or finding a quality summer team. Showcases are just that --- showcasing talents; there's plenty of time for that later.
Enjoy the ride!