Playing in the first pairing off No. 10, Gillis shot a 7-under 63. He’s at 8-under for 36 holes, in second place overall, two off the lead of Keegan Bradley, who is part of the afternoon wave.
"I'm glad I got to find out what I could do in calm conditions," Gillis said. "We were playing at a good pace and I was putting great."
Gillis holed seven birdie putts of nine feet or more, including a 32-footer on No. 13. Had he converted a 12-foot birdie putt on his last hole, Gillis could have finished with a 61 and a tie for the lead. Instead, he three-putted for his lone bogey.
"I gave it too much on my first putt and lost concentration coming back," Gillis said.
The projected cut is at 1-under.