Weis will be introduced during a news conference Friday
Weis is wrapping up his first season as offensive coordinator at Florida after spending one season directing the Kansas City Chiefs' offense. But his most extensive college experience came with the Fighting Irish, where he went 35-27 in five seasons before he was let go.
Kansas athletic director Sheahon Zenger is hopeful that Weis' high profile will energize a fan base that had grown apathetic under Gill, who was fired after going 5-19 in just two seasons.
School officials would not disclose the terms of Weis' contract.
Gill signed a five-year deal that guaranteed him $10 million, which means the school is on the hook for roughly $6 million after firing him. Weis was making about $800,000 per year with the Gators.
It was little secret that Weis wasn't fond of Kansas City during his time with the Chiefs, and he moved on to the Gators in part so that he could be near his son, who is also on the football staff. He bought a horse farm in nearby Ocala, and has several health issues that include possibly needing hip surgery after the season that could make it difficult to jump right into recruiting.
Still, the opportunity to rebuild the Jayhawks appears to be enough of a challenge.
Weis was considered one of the bright stars of coaching when he took over at Notre Dame, his alma mater. The Bill Parcells disciple had a successful debut and was rewarded with a 10-year extension, but when the program didn't progress, he was fired with six years remaining. He initially received a "termination payment" of about $6.6 million, but was to receive smaller annual payments through 2015.
Zenger rarely spoke publicly about the job search, preferring to keep his cards close to the vest. It was rumored that he was interested in longtime friend
Established assistants like Gus Malzahn also were rumored to be in the running.
In the end, Zenger's first major hire since arriving at Kansas turns out to be someone whose stock has suffered since his difficult tenure in South Bend, where he put together some of the nation's top recruiting classes but failed to turn them into national championship contenders.
Of course, expectations will be much lower at Kansas.
The Jayhawks beat Virginia Tech in the Orange Bowl in 2007, but for the most part the program has had a bleak history. Mark Mangino was considered extremely successful despite going just 49-48 during seven seasons in charge, and he left Kansas in shambles.
Gill struggled mightily, going 3-9 in his first season and 2-10 this past season.
Weis will have some talented players to build around, particularly on offense, where a young stable of running backs showed promise. But his offenses have also been built around the quarterback, and sophomore Jordan Webb struggled with consistency much of the season.
It's unclear whether Weis will attempt to get Dayne Crist to come to Kansas. The quarterback was recruited to Notre Dame by Weis, but fell out of favor with his successor, Brian Kelly. Crist has already announced he's leaving Notre Dame, and because he is graduating, he'll be eligible to play right away. He has one year of eligibility left.
Weis was in charge of some of the top offenses in the NFL during his time with the Patriots, and he helped lead the Chiefs to a surprising AFC West title last season, his only one in Kansas City.
He was hired at Florida by Will Muschamp, whose forte is defense, with the hope that he could take some of the pressure off the first-year coach. But the Gators finished eighth in the league in offense, averaging 334.2 yards per game, and were stifled by the SEC's best defenses.
The Gators lost 38-10 to Alabama, 41-11 to LSU and 17-6 to Auburn in consecutive weeks on their way to a 6-6 finish. Florida accepted a bid to play Ohio State in the Gator Bowl, though it's unlikely Weis will remain with the team through the Jan. 2 game.