It is a surname of Spanish origin. Name of an actor, humorist and Spanish Illustrator, born in Madrid and called Miguel Gila Cuesta. Means simple, simple and also naive, innocent. It is also the name of a river in the State of Colorado, United States, a county in the State of Arizona and a town in the State of New Mexico. Also said Gila or Gila Monster a poisonous lizard endemic of North America's scientific name Heloderma suspectum, belonging to the family Helodermatidae. It is slow and heavy.