William S. McGill painted and exhibited his works in Southern California in the mid to late 20th Century.   Known for his California landscapes, McGill was a member of the Desert Art Center in Palm Springs in the late 1950’s through 1960’s.

In 1965 McGill was living on Ocean Blvd. in Long Beach, California.  His exact birth and death dates are not known at this time.
 
 
Source:  
Treasury of Living, Art Desert Art Center 1965