GPS satellites are, but they might be referring to commsat constellations like Iridium that are in near earth orbits. Higher than 125 miles, though.
GPS is the Global Positioning System, the only system to provide position plots. The Iridium is a communication system. Now, it is possible that the technology utilizes both systems (and I'd be suprised if it didn't).
The article states 60" accuracy, but as far as I know, the Military is the only user that has that capability. Civilian use accuracy is 30 meters (about 90 feet). Even so, 90 feet is accurate when you are looking for a stolen car.