Ganassi has revealed that the ex-Formula 1 driver, who contested the full IMSA season last year with the team, will return to one of its cars for a second time in 2022 after being brought back for this weekend's Rolex 24 Hours at Daytona.
Magnussen is driving the #02 Cadillac DPi-V.R at Daytona with Ganassi's full-season drivers Alex Lynn and Earl Bamber, as well as IndyCar full-timer Marcus Ericsson.
But it has yet to be decided which of the team's pair of DPis he will race in the Sebring 12 Hours on 19 March.
CGR managing director Mike Hull said: "I think it is safe to say that Kevin will be with us. He is such a naturally-gifted driver and has a high energy level."
The move has been made possible by Peugeot's decision not to race its new 9X8 Le Mans Hypercar in the opening round of the 2022 WEC at Sebring.
The French manufacturer will decide when it takes up its WEC entries after initial testing with the car, which started earlier this month at Aragon in Spain.
Magnussen pointed out that he is still a newcomer to sportscar racing after only one season with Ganassi last year and a one-off with his father Jan at the Le Mans 24 Hours driving a High Class Racing Oreca LMP2 car.
"Sportscars is still a new thing for me and I still feel that I'm learning," he said.
"As a racing driver you can't practice every day like a golfer of a tennis player, so you need to be competing – it's not enough to race six times a year."
Hull wouldn't be drawn on whether Magnussen might be given permission by Peugeot to rejoin Ganassi for the Six Hours of Watkins Glen or Petit Le Mans enduros in June and October respectively.
"The one thing we don't talk about is contracts, but obviously he is able to be here in Daytona," he said.
Hull insisted that it has yet to be decided who will be the additional third driver in its squad for the second round of the IMSA series at Sebring.
Ericsson is one of three Ganassi IndyCar drivers taking part at Daytona: Scott Dixon and Alex Palou are driving the #01 entry with the car's full-timers Renger van der Zande and Sebastien Bourdais.
Hull said there is no decision on whether any of its single-seater roster will take part in both Sebring and the clashing IndyCar round at the Texas Motor Speedway.
Drivers will be able to contest Sebring on the Saturday and Texas on the Sunday because IndyCar has scheduled an extra qualifying session on the Friday of its meeting for drivers competing in the IMSA event.
"We are evaluating where we are with Scott, Alex and Marcus and will go forward next week and make a decision," explained Hull.
Jimmie Johnson will race at Texas with Ganassi and take up his seat in Action Express Racing's #48 Ally Racing Cadillac at Sebring.
It has also been confirmed that Helio Castroneves will travel back and forth between Texas and Sebring to contest both races with Meyer Shank Racing.
The four-time Indianapolis 500 winner is contesting his first full season of IndyCars since 2017 with MSR this year, and is also confirmed for the team's Acura ARX-05 DPi for the four IMSA enduros.
