After being sent in to bat at Karen Rolton Oval on Saturday, Faser-McGurk (122) and captain Nathan McSweeney (106) helped top-of-the-table, undefeated SA bludgeon 7-397, the Croweaters' third-highest total ever.
Lachlan Hearne impressed with a career-best 121 as the Bulls were knocked over for 271 off 40.1 overs in reply.
Fraser-McGurk, who has played 15 white-ball games for Australia, put his name back under the national selectors' nose, belting five sixes to raise a whirlwind 50 off just 14 balls, the fastest-ever recorded in this country, and the fourth-fastest worldwide in the format.
When Fraser-McGurk raced to 74 off 21 deliveries in the eighth over, he was on target to break his own record for the tournament's fastest-ever 100, a 29-ball ton against Tasmania three years ago at the same venue.
He was restricted to 'only' 26 off his next 28, raising his second List-A century off 49 balls.
Tasmanian Mitch Owen hit a 48-ball ton against SA at Adelaide Oval in 2024-25.
Fraser-McGurk blasted nine sixes in his 63-ball knock, dominating a 129-run opening-wicket stand with Mackenzie Harvey, whose 46 off 35 went almost unnoticed.
McSweeney, who starred in the recent Australia A tour of India, moved to his third List-A century - and second in 12 days - combining with Jake Lehmann (58) for a 115-run fifth-wicket partnership.
Queensland's response spluttered from the start, crashing to 3-46 in the seventh over.
Hearne came in at No.5 and resurrected the visitors' innings, striking three sixes in his 104-ball dig.
Hearne and skipper Jimmy Peirson (45) put on 103 for the sixth wicket to avoid total embarrassment.
Left-arm speedster Spencer Johnson captured a career-best 5-59 and finished the match when he yorked Hearne.
