Gilder never trailed after opening with a 64 on Friday. He chipped in from 40 feet for par on the final hole to finish at 18-under 198, tying the tournament record set by Christy O'Connor in 1999.
Gilder earned $255,000, more than half the sum he made over his first 22 tournaments this year. Before this weekend, he finished in the top 10 only twice in 2005. It was his eighth career victory on the Champions Tour, the first since the 2003 Emerald Coast Classic.
Gilder started the day with a two-shot lead, but an uneven start dropped him into a temporary tie atop the leaderboard after four holes. He played bogey-free golf the rest of the way, and when the leader birdied No. 11 to move four shots up, the only suspense was who would finish second.
Hatalsky shot a 69. His birdie on the 18th hole enabled him to break a tie with Curtis Strange and earn $149,600 for second place.
Strange shot a 69 for a 203 total to take third, his best finish since joining the tour this year. D.A. Weibring (71) came in fourth, one shot ahead of Tom Watson (71) and John Bland (68).
Gilder started the afternoon with a flourish. After sinking a 10-foot putt for a birdie on No. 1, he put his drive on No. 2 to the left of the cart path, but recovered for another birdie to take a four-shot lead at 15 under.
Gilder inexplicably put his tee shot in the pond on No. 3, even though the pin was far back on the par-3 hole. The double-bogey shaved his lead to one stroke over Weibring and Hatalsky, both of whom registered birdies.
Hatalsky pulled into a tie with birdie on No. 4, but Gilder sank a 4-foot birdie put on No. 5 to take the lead for good. The lead became two strokes when Hatalsky took a bogey on No. 6, and Gilder birdied the ninth hole to take a three-shot lead at the turn.