I can only speak for my own university, but I was a transfer college student and went through informal. When I participated in formal on the sister side, we weren't really concerned with the backstory of high school. Yes, we cared about extracurriculars and GPAs, but we never even knew if a girl had transferred high schools. I don't know about schools who have MEGA competitive recruitments, but we went by the impression the PNM left during actual recruitment. If you acted like a meanie, snoot, dud, etc, that's what we went by to know if we wanted you around. Be friendly and open and I'm sure you'll do fine.