On September 17, 2017, McGinn was traded by the Coyotes during training camp for the 2017–18 season to the Florida Panthers in exchange for Jason Demers.

Approaching the final year of his contract, McGinn missed training camp after undergoing back surgery, placing him indefinitely on the injured non-roster to begin the 2018–19 season.

[12] Having cleared waivers, McGinn was activated off injured reserve and assigned to continue his recovery with AHL affiliate, the Springfield Thunderbirds, on February 1, 2019.

Unsigned leading into the 2019–20 season, McGinn belatedly signed a professional tryout contract with the Charlotte Checkers of the AHL on October 22, 2019.

On November 11, 2019, McGinn (alongside former Panthers' teammate Troy Brouwer) was signed to a professional tryout by the St. Louis Blues.

[18] Along with his father, Bob McGinn, and his two brothers, he is one of the owners of the Roanoke Rail Yard Dawgs of the Southern Professional Hockey League.

Cortisone, rehab, and major surgery in the summer of 2008 helped alleviate the pain, though the lingering effects still plague McGinn, especially due to his high-pace playing style.