"He is one of those guys that has really been able to take advantage of the rule changes," Bruins coach Mike Sullivan said. "With his speed and a knack for scoring goals, he is very difficult to defend."
New Jersey snapped a a three-game road losing streak when Sergei Brylin circled around the net and connected with a streaking Gionta, who knocked the puck past goalie Tim Thomas while falling to the ice at 2:10 of overtime for his team-leading 33rd goal.
"A break here and there made the difference," said Devils goalie Martin Brodeur, who made 37 saves. "We wanted to match the way we play on the road with the way we have been playing at home."
The Devils have tied a franchise record with eight straight home wins.
Gionta put the Devils ahead 2-1 with a shorthanded goal with 12:04 remaining in the third period, but Wayne Primeau tied the game at 2 for Boston 4:13 later.
"With only two games before the Olympic break, we want to get all the points we can get," Gionta said. "The key for me is to refocus every game and not relax or back off what is making me so successful."
Just before Gionta's third-period goal, P.J. Axelsson missed an opportunity for the Bruins when he fanned on a shot attempt in the crease.
"After the shorthanded goal, we could've just quit, but we didn't," Thomas said. "We are disappointed we are not getting two points, but afterwards we'll appreciate getting one point from a good team."
The Devils have beaten Boston all three times they've played this season and all by one goal.
Glen Murray gave the Bruins a 1-0 lead when he converted a pass from Brad Boyes and scored through the legs of Brodeur at 11:01 of the first period.
Patrik Elias tied the game at 1 after the Devils successfully executed a three-on-two. Elias one-timed a pass from Scott Gomez and beat Thomas at 5:52 into the second period.
Elias has four points in the last two games and has 21 points in 17 games since returning to the Devils lineup.
Thomas made 31 saves and fell to 8-2-4 for the Bruins. He has allowed two goals or less in 11 of his 14 starts.
The Bruins have allowed ten goals over the last six games.
Boyes has registered a point in 11 of the last 12 games. ... Devils center Erik Rasmussen is day-to-day with a separated shoulder. ... The Bruins are 3-3-4 in their last 10 home games. ... Sergei Samsonov missed the game for the Boston with a foot injury. ... Patrice Bergeron has factored into six of the last nine game-winning goals for the Bruins.
Copyright by STATS LLC and The Associated Press
Arena: TD Garden Location: Boston, Massachusetts
Referees: Chris Lee, Michael McGeough Linesmen: Pat Dapuzzo, Greg Devorski