According to Automotive News, the GT project began in late 2013 by a skunk works team, including six designers, that guided the supercar along from birth until the unveiling. Ford kept things clandestine by locking the vehicle in a basement storage room, and only the group members got a key to the lock. Much of the development was also done at night to further keep the secret, but occasionally the prototype was hauled outside on weekends to check it out in natural light.
Because of the speed in getting the development done and for even more stealth, the designers didn't get input from the Blue Oval's other styling teams around the world. But that was somewhat of a double-edged sword. "You don't actually get to bounce opinions off people," Ford design boss Moray Callum said to Automotive News. "We were on tenterhooks ourselves until the first people saw it."
Even now, there are still mysteries surrounding the GT. There's still no official word on the supercar's power; just that it's over 600 horsepower. There are also the persistent rumors going back months that the Blue Oval plans to take the GT racing to celebrate the 50th anniversary of automaker's Le Mans victory. Although, maybe this time the secrecy wasn't so good because we might have got a glimpse of the racer, recently.