Experience with GPS trackers - thieves' reactions?
I've got a friend who had a cellphone stolen.  She used the provider's tools to locate the phone down to a suburban address, and went to get it back.  The teenager who answered the door knock said there was no such phone there.  Her brother called it and they heard it ringing in the background.  Some more people turned out of the house and denied her entry.  She phoned the police with this info and they weren't interested, plus advised her that entering the house to recover the phone would be illegal and that she should write a written official complaint at the police station.  She went to the police station to do a report. Her phone was turned off/wiped before she could demonstrate the location to the officer taking the report.

The phone was never recovered.

Answer GPS tracking by itself isn't going to save your ride.   You need a multilayered approach of locks, safer location, uglifying, and co-parking with nicer bikes.  Or park it inside with you.

I am fortunate to work for a company where 25% of the staff ride.  So we have dedicated floor space for secure bike parking inside.  At home my bike lives in a locked garage.  So I don't ride with a lock normally.  If I have to stop elsewhere I'll generally ride the beater MTB and a lock, rather than the nicer road bike.

Sorry its not a bike, but its relevant to GPS tracking and recovery of stolen items.

Edit:  Clarifying - location information by itself is pretty useless.  You need to be able to get support from the police to make use of the location info to get your stuff back.  Simply rocking up to the door could go either way.