He is also a co-creator and co-writer of the television series Eagleheart.
He has written for MTV's Human Giant, The Andy Milonakis Show and Crank Yankers, and directed episodes of the US version of The Office, Workaholics, NTSF:SD:SUV, Eagleheart, Blue Mountain State, Death Valley, New Girl and Nick Swardson's Pretend Time.
He is currently a contributing writer and consultant producer on the Adult Swim series Eagleheart starring Chris Elliott and produced by Conan O'Brien.
Other recent notable roles for Gatt have been as "Lars", a recurring guest-star in Illeana Douglas' Easy to Assemble, a guest-star in Eagleheart opposite Chris Elliott, as Rebecca Romijn's right-hand man, "Agent Hawk" in the NBC series Chuck, and in a hilarious role playing Ponda Baba opposite Christian Slater in the Star Wars fan favorite, "Breaking In - Episode XIII".