Depends on the application, of course. Opensource applications can be modified to read GPS data (avalaible on localhost:2000).

Most applications directly access the Serial or BT ports. According to GVM White Paper, both Serial Manager and Bluetooth Manager "are unavailable.". I don't know if this means they're unimplemented or if it's just missing the required vdrv -- the last one could could be developed, but there's mostly no documentation for it.