GNSS (Global Navigation Satellite System) is a broader category encompassing multiple satellite navigation systems, including GPS (Global Positioning System), whereas GPS is a specific GNSS system.

While GPS provides global positioning services, GNSS includes other systems such as GLONASS (Russia), Galileo (European Union), and BeiDou (China).

GNSS receivers can access signals from multiple satellite constellations, offering improved accuracy and reliability compared to GPS alone.