The online store FAQ says
"[h=4]Is there a way to purchase items in the store as gifts?[/h]Not currently, although this is something we are investigating. For the moment anything you purchase through the store will be fixed to your account, so we recommend not buying anything that you intend to offer as a gift.
"
although that text was put up there before the full boxed set was added. I've sent an 'order query' to sales support so we'll see what that comes back with.