Adafruit FONA 808 Shield - Mini Cellular GSM + GPS for Arduino Cellular + GPS tracking, all in one, for your Arduino? Oh yes!
GPS/GPRS/GSM Shield V3.0This is a GPS/GPRS/GSM shield from DFRobot. This shield with a Quad-band GSM/GPRS engine works on frequencies EGSM 900MHz/DCS 1800MHz and GSM850 MHz/PCS 1900MHz. It also supports GPS technology for satellite navigation. It's possible for your robot and control system to send messages and use the GSM network.
Adafruit Ultimate GPS Logger Shield Brand new and better than ever, we've replaced our Adafruit GPS shield kit with this assembled shield that comes with an Ultimate GPS module.
GPS Shield The new version of this shield allows for either 3.3 or 5v logic, a separate and more robust VIN connection, and the PWM input has moved to pin 3. This is a motor shield for Arduino that will control two DC motors.