There are plans for this, but at the moment it's not possible.
How it will work is that you buy a "gift certificate", which is a link. The one using that link later on can claim the membership attached to it. I would hope we get around to implement it this year, but I can't give that promise right now. It's a nice to have thing, but honestly, not many who has asked for it, yet.
But it would be higher prioritized if we notice that the demand raises. Either by more users writing in this thread, or by contacting us in other ways regarding this.