"Credit to the girls, we fought really hard throughout the game and I'm so proud of them all. Great Britain were after the shoot-out but we kept battling and were disciplined with our structure. I'm just really happy right now," she said.
The Black Sticks made a superb start and created plenty of opportunities in the opening quarter in what promised to be a game full of running.
Pressure on attack led to a penalty corner for New Zealand two minutes from quarter time, but the play broke down at the top of the circle.
Midway through the second period the Kiwis got onto the scoreboard when Anita Punt got hold of a deflection in the circle and rocketed home a flick into the side net.
Great Britain had the chance to equalise with a penalty corner just seconds from halftime but the shot was snuffed out by Black Sticks goalkeeper Sally Rutherford.
Six minutes from fulltime Great Britain levelled the score at 1-1 after a video referral deemed a tackle from Brooke Neal to have caused enough stick interference to award a penalty stroke.
But the Kiwis weren't done and poured the pressure on in attack which led to a chance for Olivia Merry to pull off the game winner from a tight angle.
BLACK STICKS 2: (Anita Punt, Olivia Merry)
GREAT BRITAIN 1: (Helen Richardson-Walsh)
Halftime: New Zealand 1-0