Partyreptile,
Contrary to your misconception, the GSS pilots will not be FAA licenced or trained by necessity, only by co-incidence. GSS was set up in response to the CAA's inistance (thanks to the continous and persistant pressure from BALPA), due to British Airways long term 'flagging out' of their World Cargo contract to Atlas. GSS pilots will have to have JAA licenses regardless of any FAA licences they may hold, and the rgiht to live and work in the EEC - just as GSS has to be 51% EU owned.
You can argue that this situation is a sham and that GSS is just another fron to AACS or Atlas, but these are the facts.