On the Electronic Ticketing FAQ, there's an entry about giving tickets to friends:

How can I give E-Tickets to friends?In your Gen Con account, you will be able to give individual E-Tickets to anyone on your Friends list. (Not implemented yet, so details TBD)

Is there a timeline or road map for this feature? E.g., will it be available before the convention?

This is particularly relevant to True Dungeon, as we had someone buy several tickets as Another ticket for me, and it'd be great to assign those to our group's individual badges.