Gary Gulman requires Flash player download Flash Gary Gulman has performed on several television shows, including Last Comic Standing, The Late Show with David Letterman, The Tonight Show with Jay Leno, and Comedy Central's Premium Blend. In 1999, Gary was selected to perform in the prestigious Montreal International Comedy Festival. Within six months of his performances at this showcase, attended by hundreds of comedy industry elites, he reached milestones that many entertainers never reach.