I don’t know how hard to do this would be, or if it would lend itself to abuse, but I’d love to be able to give gems as gifts. A thought as to how:
Keep the same gem buying interface but add a field to enter the recipient’s account name. By default it would be yourself; perhaps you’d toggle a box and type in the account you want rather than your own.
As a bonus, have it generate a game mail (or an email) to that person “So and so has given you such and such an amount of gems.”
Man, my XMas shopping would be so easy!