I had a similar experience with my phone. Not with gps but with a phone conversation with my doctor and an ad targeting me.
I had a phone conversation with my doctor to make an appointment for radiocardiogram the next day. It was a brief conversation around 2 minutes.
On the hour long bus ride over to the radiocadiologist's office I was listening to Pandora radio. I had 3 ads for radiocardiologists. I was creeped out. I've never heard an ad for radiocardiograms on Pandora ever and didn't know what ome was until I asked my doctor what it was on the phone.
There is only two explainations. Total coincidence or that I was being targted with this ad by Pandora. If it were the latter it would would be two explainations.
- The doctor's office sells my health records to ad agencies.
- My conversation was being recorded as a text file and being sold to ad agencies.
It probably isn't the second one but I wouldn't be suprised if it is possible.