I think it's unlikely... we mostly plan to serve the Windows market by making
cloud.gaiagps.com do more of what the app does (route-planning, map download selection, etc.)
A native Windows port would be a large project, and as far as large projects go, I'm much more interested in 1) better using vectors so we can make the maps smaller, 2) folders/collections, 3) more data acquisition for iOS/Android, and 4) advanced GIS import/export like MBTiles, shape files, etc.
I also think we probably have more demand for a native Mac app, and that's not in our dev plans yet either.