Most newer automobiles produced in the U.S. and some in Europe now come equipped with GPS Systems as standard equipment, however for older cars you must Buy A Gps System yourself. The Global Positioning System (GPS) is a United States space-based radionavigation system which provides reliable positioning, navigation, and timing services to both civilian and military users on a continuous worldwide basis and is offered free for all to use. The GPS is made up of three parts: satellites orbiting the Earth; control and monitoring stations on Earth; and the GPS receivers owned by users. GPS satellites broadcast signals from space that are picked up and identified by GPS receivers. Each GPS receiver then provides three-dimensional location (latitude, longitude, and altitude) plus the time.