Garmin recently unveiled a new technology for their G3000 General Aviation avionics system, the Garmin Autoland. They claim it can safely and fully autonomously land the aircraft in case of pilot incapacitation.
Traditional autoland systems found on airliners use Cat. II or III Instrument Landing System (ILS) approaches to guide the aircraft onto the runway (and keep it on the centerline afterwards). But according to this article Garmin will not use ILS, but rely on GPS approaches only:
[t]he availability of a GPS approach with lateral and vertical guidance to the runway is also required when the system is considering various airports and runways.
Can GPS alone provide accurate enough guidance all the way to the runway including the flare? Usually RNAV approaches have higher LPV minima than even a Cat. I ILS.
As far as I know, the autopilot also cannot control systems like the landing gear, the flaps and the brakes, but all are needed for a fully autonomous landing. How does the Garmin system handle this?