It's possible... But right now, you can only gift through a prepaid card, and the only prepaid card options available are: PaySafeCard, Ultimate Game Card, Rixty, Wallie, GoCashCard and Ukash.
First log in, then go to deposit. There are mini-categories that listed below deposit, which are basically payment methods. Click prepaid cards, then select what card you want to use. Then you can gift, and do what ever you want from there.