Will GPS continue to be free of charge once the US military have no more use of it ?
It looks like they will be using for approaches themselves although I'm not sure whether it's ordinary GPS or one of their special military channels:
The Joint Precision Approach and Landing System (JPALS) is a key component enabling U.S. military forces to be highly mobile and capable of "rapid response" on a global basis to a wide range of military scenarios. Similar in concept to the civilian Local Area Augmentation System (LAAS), JPALS will be based on differential Global Positioning System (GPS) technology, and will consist of modular avionics and ground/shipboard components to provide a range of landing minima and system configurations. Aircraft will receive ranging and navigation data from the satellite constellation and differential ranging data or corrections from a ground/shipboard station via a data link