The Australian made the most of the clean 1.5m waves in Taranaki to sink Hawaiian Carissa Moore in the final.
The final was a close affair, with the lead changing hands on several occasions, but the in-form Gilmore held her nerve to continue a stunning start to the season.
“This is by far the best start to a season I’ve had in my career,” Gilmore said. “To have three Finals straight off the bat, I’m kind of tripping out. It’s really cool.
"That was a really close Final, I’m sure it could have gone either way. I watched Carissa’s wave from behind and she did that huge first turn and then raced to the next section, but if she did another turn straight away, I’m sure she would have gotten the score. I’m glad it went my way though.”
“I just let a couple of waves go under my priority,” Moore said. “I didn’t think they’d offer that much, but Steph did a really good job. You can’t discount her, she’s won four ASP Women’s World Titles.
"It’s nice to be up there again. I really like this event, I have a really great support team and there’s a lot of love here. I’m really stoked. Each event and each year is a clean slate and something different and I’m trying my best to get better with each one.”
Stephanie Gilmore (AUS) 15.76 def. Carissa Moore (HAW) 15.06
SF 1: Stephanie Gilmore (AUS) 16.44 def. Paige Hareb (NZL) 14.07
SF 2: Carissa Moore (HAW) 12.93 def. Lakey Peterson (USA) 11.92
QF 1: Paige Hareb (NZL) 14.33 def. Laura Enever (AUS) 12.16
QF 2: Stephanie Gilmore (AUS) 12.33 def. Tyler Wright (AUS) 11.60
QF 3: Lakey Peterson (USA) 16.50 def. Sally Fitzgibbons (AUS) 14.00
QF 4: Carissa Moore (HAW) 15.66 def. Courtney Conlogue (USA) 12.90