We got GPS trackers for our two cats because we were wondering where Kira went when he spent nights away from home. We found out he was going next door, then over their fence into the rear property. But after that we've found that he barely goes anywhere. Rowan, on the other hand, crosses the street out the front and goes to the next street after jumping the fence.
I let them out at around 6:30am and I guess that's when all the wandering happens.
I understand that GPS trackers are more common to use for dogs. My parents once had a dog who would escape at any opportunity and usually the ranger would pick him up. He used to do this despite being walked twice a day and being played with in the backyard. The GPS tracker would have been useful for their dog.