It depends on the GP, and what he or she prefers to do. That's the best part about general dentistry, you can go super full scope, or limit your-self to certain procedures.
As a new grad, you can't be picky about what you want to do. Gotta kill those loans first! (that's my own personal opinion)
To answer your d-school question; Yes, you do learn how to do RCT's and a bit about orthondontics (I'm assuming the amount you learn varies a lot among schools). However, I do know that at certain schools you become invisalign certified when you graduate, like UOP.