Garmin and android headunit

[logic2996]

I was wondering if anyone has been able to get the garmin to work while having an Aftermarket head unit installed, or has anyone been able to get the doors opening indicator, reverse indicator and gauges to work on the Aftermarket one, iv got a seat ibiza 6j with the hazard cluster under the headunit as pictures below, iv looked on another thread and there's a video on how to do it and it's in Spanish so cant understand what he is saying or what is doing, iv put pictures below to what i had to what iv upgraded to