Driskel, who will be a fifth-year senior, will be eligible to play immediately under the NCAA's graduate transfer rule.
"I look forward to the upcoming chapter of my life. I have nothing but good things to say about the University of Florida and the football program there," Driskel said in a statement released by the Gators. "... Although things did not play out on the field as I would have liked, I have no regrets on the choice I made to attend UF."
Driskel led Florida to a 28-20 victory over East Carolina in the Birmingham Bowl on Saturday but was released from his UF scholarship before the game.
He completed 59 percent of his passes for 3,411 yards at Florida, with 23 touchdowns and 20 interceptions. He also ran for 644 yards and nine scores.
Driskel threw for 1,140 yards, nine touchdowns and 10 interceptions this season. He battled injuries throughout his career with the Gators.
Driskel, who was rated among the nation's top quarterback prospects out of high school in 2011, joins a Louisiana Tech team coached by Skip Holtz that finished 2014 with a 9-5 record.
The Bulldogs lost in the C-USA championship game to Marshall, but defeated Illinois 35-18 in the Heart of Dallas Bowl.
The Associated Press contributed to this report.