Things were different in those days. Unmarried girls who became pregnant were a source of shame for their families and were frequently sent to places like Good Shepherd. For teenage girls in Phoenix in the '60s and '70's, the threat of being sent to Good Shepherd was something our parents could (and would) use to help keep us in line (I used education with my kids).
I don't remember Good Shepherd as a school (thought I imagine they held classes for the girls), I remember it as a convent.
I was very pleased when they decided to save the buildings instead of tearing them down.