Facebook Friend Location Tracker

I urgently need someone with a cybersecurity backgound to assist in tracking a friend's facebook profile page to determine her last known location. It would be fantastic if we could get her specific GPS location, i.e. longitude and lattitute coordinates, so we can pinpoint where she is/was recently. She ran off without notice and might be in danger; we are tring every possible avenue to determine her most recent location so we can locate her.