PCL MVVMLight across Xamarin Native UI (IOS, Android, WP) without Forms

Hi,

I was wondering if that is possible to access from IOS or Android (native UI) with MVVMLight ViewModels from a PCL library.
Bascially I'll not go for Forms as the UI need Clustering and all the jazz for high performant map control with loads of items.
But I would like to use the shared PCL that is currently using MVVMLight.

I've heard about MVVMCross. I would like to know (sample for instance) how to do it (using a native MKMapView for instance).

Thanks a lot!
Marc