First the Pixhawk accepts I2C , UAVCAN, and serial UART to connect GPS so what is your module able to work with in Pixhawk? - Any of the RTK module work well
Is the setup requires deep Ucenter involvement to get it up and running or it’s only set using Qgroundcontrol and pick right Baurd rate and fly? - run through the info here https://docs.px4.io/master/en/flight_co … hawk4.html …looks like a little of both?
Is there a video shows the setup for PX4? Not that we have; I bet there are videos in drone forums/youtube, though.