Officers may well use the GPS data to Identify the vehicle lawfully. On top of that, rules differ by state relating to police access to this knowledge with no warrant, reflecting the necessity for compliance with community restrictions. Some (although none tested here) will increase VHF monitoring together with GSM https://www.trackerfit.co.uk/blog/stolen-car-recovery-why-24-7-monitored-trackers-make-a-difference/