Sadly they don't have anything you can gift - not even fantasias. Your only option to give something ff14-related would be to buy time cards and give your friends the codes, but that'd be expensive. (they should add 5/10-day giftable time cards to the shop... That'd actually be a nice addition).

PS.I don't personally support the cash shop but I think it's sweet you wanted to use it to show appreciation for your online friends.