SimpleBGC Alexmos 2.4b6 gimbal control from Pixhawk PX4 serial to UART

Looking at the Ardupilot wiki for gimbal control, I see that the SToRM32 gimbal can be controlled from the Pixhawk PX4 serial port to the gimbal UART. The SimpleBGC 2.4b6 controller also has a UART port. Does anyone have experience of whether this works and how?
I already have RC9 & 10 in use for landing gear and camera trigger, hence, the ability to control the gimbal via the UART would be good.
Any knowledge would be greatly appreciated.

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