With respect to all the "view with alarm" postings that will follow, this really doesn't mean anything. I leave my home at the same time every morning. The transponder in my car records my passage and debits my account with the state highway department. Traffic cameras record my license plate at several points during my journey. Once out of the car, my smiling phiz can be seen on any number of CCTVs en route to my office, whose door I open with a card that automatically records my entry. The IP address of this posting will reveal that I am sitting in my living room as I write. Even without the GPS turned on, my phone regularly initiates a conversation with the local cell tower. I can be found with almost pinpoint accuracy.
So I'm not exactly going to panic to learn that my computer and phone keep a record of my latitude and longitude that they don't share with anyone else.
The government already knows where I live, where I work, where I bank, and all kinds of other interesting information. It's how they collect their taxes and send me my mail.
If there were the slightest indication that liberals, atheists, and other enemies of the state were being tracked by their GPSes and rounded up, I'd be the first to the barricades. But there isn't. Our privacy is not based on "nobody knows", it's based on "nobody cares."