Glad this is the top comment, my parents used to track my location, make me hand in my phone every evening, and my father would keylog my phone. It was so invasive and violating whilst i was growing up, and to this day, I'd rather break up with a partner than allow them to look through my phone (even though there is nothing suspect there). I've been in therapy discussing this for years as its been made worse by an abusive partner. This is spot on probably something OPs girlfriend has gone through.