all you have to do is look at the coaching roster. Locksley is listed as OC and Gattis as WR coach and co-OC. pretty clear hierarchy.
on the other side of the ball, the co-DC (not the DC) was getting mentioned for DC jobs at Ole Miss and Oklahoma
Geoff Collins was DC at Florida before being Temple's HC, now on to HC at Georgia Tech. Addazio was Florida's OC before taking the Temple job -- leading to the HC job at Boston College. Al Golden was UVA's OC before getting to Temple HC then on to Miami HC.
HC at Temple is definitely an upward move for Gattis.
I grew up near Philly and Temple was never a football power. It was more well known and one of the Big 5 basketball colleges in Philly, and Bill Cosby's alma mater.
In the past dozen years or so, it really has been a launch pad for a lot of P5 coaches.