He is known for the discovery of the first occurrence of Crosbysaurus from Utah,  as well as his studies of cannibalism in Coelophysis and sexual dimorphism in Dilophosaurus. Since , Gay has taken high school students to the Chinle of Comb Ridge , Utah, and he is currently making new discoveries there. In December , he and coauthors Xavier A. Foster of the Museum of Moab formally published their study on the oldest known dinosaur from Utah, a neotheropod that is likely an animal similar to Coelophysis. In the summer of , Gay discovered the first occurrence of Crosbysaurus from the Triassic of Utah. Jenkins, Xavier A. First unambiguous dinosaur specimen from the Upper Triassic Chinle formation in Utah.