Help with Aftermarket Pioneer with OEM GPS Fin

[MacWarrior]

Hello all,

I want to use my factory OEM Fin GPS (& OnStar) with my Pioneer AVIC-8500 but I can't find any info if it's possible and, if it is possible, any adapter information. I have already found the information for the SiriusXM antenna. Any help would be Greatly appreciated.

(I posted this in Audio & Electronics too but not getting any response or help so I thought I would post this here too.)

Thank you in advance,

MacWarrior