Golden State Overnight (GSO) is a leading provider of overnight delivery services to every address in California and metropolitan regions of Nevada and Arizona. The company was founded in 1995, is based in Pleasanton, California and serves its customers from 31 operating facilities throughout the Western U.S. With a focus on exceptional service levels, web-enabled systems and a 100% employee-based delivery model (no independent contractors), GSO offers a strong alternative to the other regional and national carriers.