Hyde Park Entertainment chairman and CEO Ashok Amritraj made the announcement on Thursday  in the run-up to Cannes.
Gary will report to Hyde Park International (HPI) president Eric Christenson and joins the company as it assembles arguably its most prestigious sales roster to date.
HPI titles include Untitled Elmore Leonard Project starring Jennifer Aniston, John Hawkes and Tim Robbins, Every Secret Thing with Diane Lane, Elizabeth Banks and Dakota Fanning, Adult World with Emma Roberts and John Cusack, as well as upcoming Tribeca world premiere Sunlight Jr with Naomi Watts and Matt Dillon
Gary previously worked at IM Global and before that Essential Entertainment. He started his career as an assistant in the global finance and distribution department of William Morris Endeavor.