According to Tom Gulitti of the Bergen Record, it appears to be a temporary move and that Gelinas will be with the big club for Tuesday's game.
Will it happen? Who knows. GM Lou Lamoriello has stated before that he doesn't like to have one-way contracts on their way to Albany. Unless he sends down Adam Larsson, the player designated for Albany would have to clear waivers first.
The obvious candidate seems to be Peter Harrold. It seems unlikely that anyone would claim him, but if a team did, the Devils can certainly survive the season without him.
While it would seem wise for the Devils to keep Gelinas on the big roster, nothing would surprise us.