The difference between GPS antenna and GSM antenna: 1. Different antenna types: GPS antenna is a circularly polarized antenna and GSM antenna is a linearly polarized antenna for satellite communication; 2. Different uses: GPS antenna is used for satellite communication and GSM antenna is used for mobile communication; 3. Different frequencies: the frequency of GPS antenna is 1575MHz , 42 plus or minus 10 MHz; GSM antenna uplink 890 to 909 MHz; Downlink 935 to 954 MHz. They both can be made as high gain antenna.