Does anyone know if we can connect the Garmin GVN53 navigation module on a 997.2 with the Bose surround sound system and universal audio system?

I love garmin products and it s a cheaper solution that the 3.5K Porsche navigation module...

 

my uneducated guess would be - with 95% probability - not possible.
but you can definitely try to open up PSM and see if it is possible to feed a video signal into it. I doubt it.