The only boards currently supported are the Electron, Photon and Redbear Duo. You can buy a regular Carloop (https://store.carloop.io/products/carloop), and separately purchase an Electron from Particle. That is equivalent to Carloop 3G (which is currently out of stock as a kit).
If you’d like GPS capability, you can purchase Carloop Pro which comes with the Electron + GPS and SD card reader.