Ah, the search only found repaints. Alpha India Group have an FSX-compatible model, you'll need to register on their forums and then search for TFS A380-800, unless this link works for you: https://www.alpha-india.net/forums/index.php?topic=25437.0
So true Nels, I'm just a stick and rudder guy in smaller aircraft,
The comment was directed towards advance electronics in a 172, not the Garmin system itself.
I also fully appreciated the Collins FMS in the C-12R (got me across the Atlantic).