The Gps Data Logger. The use of Gps tracking technology to show the way surveillance by law compulsion agencies and inexpressive citizens has been underway for many years. inexpressive investigators have used the technology to survey cheating spouses, misuse of enterprise equipment, guarnatee fraud, child custody violations and other location related issues. Many privacy advocates have screamed foul about the perceived loss of privacy straight through the use of this technology. surveillance activities may or may not be legal depending on the location and type of device.