From the RM auction description:
The Ford GT presented here is a 2005 model, and it is the seventh example produced. Never titled, it has remained with the Ford Motor Company as a promotional vehicle since it was built and today, it is offered publicly for the first time with its Manufacturer’s Statement of Origin. Virtually new, it has accumulated only 7,765 miles to date and displays a striking Centennial White exterior finish with blue racing stripes. It should be noted that the car offered here predates chassis no. 10, the first Ford GT officially sold to the public, and will be sold directly from Ford Motor Company to its first owner. Complete service records are available upon request and the remaining bumper-to-bumper warranty continues through November 8, 2010 or 36,000 miles.
From Ford GT The Legend comes to life, page 130:
The car will be the first car offered to the public. It will have a VIN number of 10, which is to say the first nine will be held within the company, not sold.
Well, not sold until August 2009.
Perhaps VIN 1-6, 8, 9 will be sold at some point in the future.