Chris Anderson carded a 5-under 66 and is tied for third place with Brett Wetterich, who shot a 3-under 68 on Saturday. The duo is knotted at 10-under-par 203.
Jones, who trailed first by a stroke heading into the third round, birdied the fourth, but lost a shot to par because of an errant drive at the fifth. He rebounded with birdies at six and eight and saved par from a bunker at the ninth when his tee shot hit a tree, which stopped it just short of a water hazard.
Jones recorded back-to-back birdies from the 12th to get into first place. He padded his lead with birdies at his final two holes to put himself into position for his first victory on the Nationwide Tour.
'I thought I played well yesterday,' said Jones, who needed only 24 putts on Saturday. 'Today, I played really, really well. I hit it from point A to point B. I don't play the high percentages and I don't take chances.'
Gow put together the lowest round on Saturday with a 7-under-par 64. He only managed two birdies over his first 12 holes, but caught fire on his back nine.
Gow birdied four in a row from the 13th, with three birdies from 15 feet or longer. He two-putted from 45 feet at the par-5 last to get closest to Jones' lead.
'I was thinking if I don't make up some ground on the back I'll be too far behind him,' said Gow, referring to Jones' lead. 'You don't want to be behind him because you'll lose.'
Jeremy Wilkinson posted a 2-under 69 on Saturday and is alone in fifth place at 9-under-par 204. Eduardo Herrera (64), Brad Ott (65), Kyle Thompson (70) and Franklin Langham (70) are tied for sixth at minus-8.
Doug LaBelle II (67), Jason Buha (68), P.H. Horgan III (69), Todd Demsey (69) and Hunter Haas (71) are knotted in 10th at 7-under-par 206.
Tim Simpson, the second-round leader, shot a 4-over 75 and fell into a tie for 15th place at minus-6.