A third-round 4-under-par 68 at Le Golf National leaves the former model leading by one stroke at 12-under-par 204.
Golding has never finished higher than sixth in 200 tour starts, but is aiming for a first prize of just over 290,000 pounds, which is almost as much as he earned his entire career prior to this season.
Englishman Malcolm Mackenzie, also 40 at the time, won his first tour title in this event on his 509th attempt.
Halfway leader Thomas Bjorn bogeyed three of his first seven holes, but would have shared top spot except for missing a three-foot putt.
Celebrity Couples of 2014 [PHOTOS]