"I was really smart with my targets out there today. It's playing tough; the wind was swirling and it was really hot so the greens were really firm. I'm happy with the way I grinded it out and got in under par.
"I just had so much fun out there. After eight months off I thought I'd be rustier than a nice wee 70, one-under.
"I said to my caddie when we were walking off the green, I actually thought to myself this morning, I have the game to win this thing, and then coming down 18, which was my ninth hole today, it was nice to see 'Garvey' up on the leaderboard, so I'm just enjoying it and enjoying being in the position that I'm in because I've worked hard and I deserve to be here, so just go out there and do the same thing tomorrow."
The 20-year-old is currently based in the United States, and eyes a move into the professional ranks after completing her studies at the University of Southern California.
After ending the opening round in a tie for 12th, she will look to push on when she plays the Jackrabbit course tomorrow.
Fellow Kiwi and former World No 1 Lydia Ko wasn't much further off the pace in her opening round, finishing with an even 71 on the Jackrabbit course to sit in a tie for 24th.
Ko had a rather erratic round, with three birdies, one eagle, three bogies and one double bogey on her score card.
American Amy Olson sits atop the standings after the opening round of play on four-under, with Japan's Hinako Shibuno, Thailand's Moriya Jutanugarn, South Korean A Lim Kim, and Filipino Yuka Saso tied for second on three-under.