 Gas was born in Mexico City, Mexico.His parents were Ángel Sánchez Bellido and Leonor Gas Murillo.The painting Homenaje a Magritte and a collection of Gelsen Gas sculptures are part of a permanent collection of the Museo de Arte Moderno (the Museum of Modern Art) in Mexico City which also includes the work of the artists Frida Kahlo, Olga Costa, Diego Rivera and David Alfaro Siqueiros.