Hi,
I'm trying to setup my new M8Q-5883 on a Speedybee F7 V3.

As you might know, this component comes with a compass + GPS.
The compass part was easy: just select the compass model and that's it.

Regarding the GPS, I don't seem to make it work.
GPS is installed in UART6 using the provided FC cable.
Unfortunately, the GPS icon stays gray and the UART6 doesn't seem to enable even after selecting

https://imgur.com/a/ZTZ9huf

Can you post a CLI dump? How are you "enabling" or "selecting" UART6? All you need to do is set UART6 sensor input to GPS. Do not check Configuration/MSP or SerialRX.

Ensure that the connections are:

FC RX --> GPS TX
FC TX --> GPS RX

Try inspecting the pins on the wiring hardness that plug into the GPS unit to ensure none of them are bent or causing a short.