"To walk away with the trophy ... it wouldn't matter what amount the first place was," Gulbis said. "To win another individual title would be huge for me."
There is plenty of work left, and a dozen players separated by four shots.
Stacy Lewis virtually wrapped up the Vare Trophy with a tournament-record 63, and has a chance to do so much more. Lewis was two shots behind, along with Shanshan Feng of China (67), Lexi Thompson (67) and 36-hole leader Sandra Gal, whose 74 let so many players back into contention.
Michelle Wie had a 66 and was three shots behind. Wie played with Lydia Ko, the 16-year-old from New Zealand who shot 72 and was nine shots behind in her pro debut.
Gulbis, who is getting married next month, became ill at her first tournament of the year in Thailand and later was diagnosed with malaria. She was told to rest for two months, take "medicine I can't even pronounce," and she spent the first part of the year trying to return too early and suffering setbacks.
It wasn't until June that she could get through a round of golf and have enough energy left to practice. She didn't qualify for any of the events on the Asia swing, instead spending that time at home in Las Vegas retooling her swing with coach Butch Harmon.
But she hit her stride on a warm day along the gulf shores of Florida. Even though the 5-iron was a shock, she quickly piled up birdies.
"To be in the mix, and to be making birdies, is what you play for," Gulbis said.
Five players had at least a share of the lead at one point, and Sunday should be a sprint to the finish. Gal made this dynamic leaderboard possible with a double bogey on the second hole, and the German never quite recovered. After making 14 birdies in the opening two rounds, she made only one on Saturday.
Lewis felt a sense of relief even as the leaderboard was tightening.
Suzann Pettersen has to finish nine shots ahead of Lewis to win the Vare Trophy for the lowest scoring average. They started the day tied at par, and Lewis walked off the 18th green knowing she was virtually certain to become the first American since Beth Daniel in 1994 to win the prestigious award.
Lewis had a 63. Pettersen struggled to a 71, and needs a 17-shot swing on Sunday to overtake Lewis.