At the start of the month, Xbox One's much anticipated game gifting program was rolled out to select users
from the Xbox Insider program. While it still remains in the insiders program for the moment, the latest update will roll out the feature to all users in said program, Mike Ybarra announced. Additionally, he also confirmed that DLC will be gift-able as well as fully-fledged titles.
Even if this code is real, it's probably gone now.
No word on when the feature will roll out to everyone, but provided everything goes well in this latest round of testing, you can probably expect to see it roll out to all Xbox users sooner rather than later, particularly with holiday season just round the corner.