Nineteen-year-old Gill led from the start after opening with a seven-birdie 68 and added 69 69 73 to win by three shots.
Wheatley’s Kealan Lowe (72 68 72 72) tied for third while Moortown duo Ben Firth (73 69 71 72) and Phil Tomkinson (72 69 72 72) were joint seventh, one shot back, along with Gill’s Lindrick club-mate Nathan Fell (69 69 73 74).
Gill, who triumphed in a 120-strong field that included players from 10 different countries, was quick to give praise tohis father for his support.
“My dad has given me the opportunity to play golf full-time, which is something I will be forever grateful for,” said Gill, who earlier this season placed sixth in the Duncan Putter at Southerndown.
“This has allowed me to practice or play basically every day, which is something you need to do if you want to make a career out of golf.”
He also thanked Lindrick professional John King, who has been coaching him for the last four years, physiotherapist Paul Farquarson and Lindrick. “The facilities at Lindrick are fantastic and have no doubt played a massive role over my improvement over the last few years,” he added.
“I also owe a big thank you to all of the members at Lindrick for the continuous support and encouragement.”
Hallamshire’s Holly Morgan placed eighth in the St Rule Trophy at St Andrews with a seven-under-par 219 aggregate (75 71 73), six shots back of the winner, France’s Pauline Roussin-Bouchard.
Woodsome Hall’s Curtis Cup player Rochelle Morris finished 21st at three under (76 73 74), two shots and three places ahead of Yorkshire county team-mate Olivia Winning, of Rotherham (74 70 81). Selby’s Ellie Goodall (70 75 81) was 29th.