Trained by Michael Dods, who excels with sprinters, the four-year-old has made giant strides this season.
A winner at Ayr in April off a mark of just 84, he has also won at Ripon before taking the Scottish Stewards' Cup last time out.
That win earned him a 6lb penalty - but as the handicapper only saw fit to raise him 5lb for that narrow win, he was effectively racing from 1lb wrong at the weights.
Usually in such a competitive race that could be crucial, but Commanche Falls (10/1) is clearly improving at a rate of knots still.
He initially looked to be on the wrong side of the track as Major Jumbo carried the far side into an early advantage.
With a furlong to run both groups appeared neck and neck, but Connor Beasley had only been biding his time and Commanche Falls finished just ahead of Gulliver. Great Ambassador was third, with Total Commitment in fourth.
Dods did not make the long journey to Goodwood from his Darlington base, but said: "It was some performance as we were a bit worried about the ground. He has won on soft, but at that level we thought he needed better ground.
"To do that with a penalty was unbelievable, he would have got in without it but you don't know that at the time and the Hamilton race was a nice one to win.
"It's great for the owners, it's great for Connor and great for everyone, these are the races you want to be involved in.
"He's a half-brother to Dakota Gold, but the two do things completely differently as he would prefer to go forward while this lad likes to be off the bridle at halfway and come through horses. For them both to be at the level they are is unbelievable.
"He seems to be improving with every run this season, it's incredible what he's done so we'll see where we go. He's won a very competitive race nicely today so we can look forward to the future with him.
"He'll be entered for the Ayr Gold Cup, but he's surprised us a bit today really - we thought if he was in the first six or seven we'd be delighted in those conditions. I'll have a chat with Connor, but Ayr would be the obvious target depending on his weight.
"He's an exciting horse who hasn't had a lot of racing so we can look forward to the future with him."
David O'Meara said of Gulliver: "Gulliver has run really well. The ground was absolutely perfect for him, he loves it slow.
"He was getting there all the time late on. Slow ground really played to his strengths and Adam Kirby gave him a great run.
"He has run a blinder and there was no hard-luck stories. I just thought he was running out of time late on.
"The Ayr Gold Cup could be something we think about."