Hi @steveb2014 ,
Using a TELEM port should get you the same interface as standard Pixhawks, perhaps some params need to be changed for baud etc.
Do you have specific issues or errors you are seeing?
Thanks!
Also, some info on our use of a gimbal with FlightCore here --> https://docs.modalai.com/voxl-m500-gimbal-user-guide/ although it was using a little 2-axis PWM controlled gimbal.... I think the MAVLink approach is better.