If you are using the Cubepilot flight controller, you can select the DroneCAN version or the UART6-pin version.
The CAN version will be connected to the CAN1 or CAN2 port, and the UART 6-pin can be connected to the GPS2 port.
UART6 Pin version
If using the UART 6-pin version with Cubepilot flight controller and Ardupilot, set Serial3_Protocol to -1 so that Ardupilot will read the GPS2 port for GPS data if there is nothing connected on the GPS1 port.
Note: This GPS does not have anexternal safety switch; you should disable the safety switch function on the ground control station application.