Gabe Jacas grew up in Port St. Lucie, Florida and attended Fort Pierce Central High School. In addition to football, he also won two titles in wrestling. Jacas was rated a three-star recruit and originally committed to play college football at Tulane during the summer before his senior year. He later flipped his commitment to Illinois after coach Bret Bielema received a tip from an area scout and offered him a scholarship.
Jacas was named a Freshman All-American in his first collegiate season. He played in 13 games with eight starts at outside linebacker, collecting 35 tackles, five tackles for a loss and four sacks. The sophomore outside linebacker had another solid season in 2023. He played in all 12 games with 10 starts, 9 at outside linebacker and 1 at defensive line registering 31 tackles, four tackles for a loss, four sacks and one forced fumble.
He was named All-Big Ten Third Team after a very productive 2024 season.