Three-time Emmy-winning composer Gary Lionelli received a 2017 Primetime Emmy nomination for his score for the 2017 Academy Award-winning film O.J.: Made in America, directed by Ezra Edelman, depicting the rise and fall of O.J. Simpson from football legend to murder suspect. Also for Edelman, Gary most recently scored the Netflix unreleased nine-hour, 6-part documentary The Book of Prince, about the life of the late singer.

Gary also scored Rory Kennedy's 2022 blockbuster Netflix film DOWNFALL: The Case Against Boeing, produced by Ron Howard and Brian Grazer. Also for Rory he scored the 2015 Academy Award-nominated film Last Days in Vietnam. For HBO, he scored the dramatic series LUCK, helmed by Michael Mann and David Milch and starring Dustin Hoffman.

Gary received a 2021 Emmy Nomination for his score for HBO's The Soul of America. Some of his other work includes the HBO films, The Perfect Weapon, directed by John Maggio; Foster, by Academy Award-winning filmmakers Deborah Oppenheimer and Mark Jonathan Harris; and the HBO series Nuclear Family, directed by Ry Russo-Young. Gary has also written the score for The Clinton Affair, with filmmakers Blair Foster and Alex Gibney, and the PBS series Taken Hostage for director Robert Stone.

Gary currently lives in Los Angeles, California.