"A goalkeeper shall be assessed a minor penalty when he throws the puck forward towards the opponent’s net. In the case where the puck thrown forward by the goalkeeper being taken by an opponent, the Referee shall allow the resulting play to be completed, and if goal is scored by the non-offending team, it shall be allowed and no penalty given; but if a goal is not scored, play shall be stopped and a minor penalty shall be imposed against the goalkeeper."National Hockey League Official Rules 2007-08,
Rule 67.3 (page 91), emphasis added
You'll probably notice one passage in particular; "towards the opponent's net". Since the Gerbinator simply threw the puck out of the zone towards the corner, no penalty was assessed. Good work, referees Dennis LaRue and Mike Hasenfratz and linesmen Greg Devorski and Mark Shewchyk!