Gary Chapman wurde am 8 August 1952 in Los Angeles, California, USA geboren. Er war mit Carol Flake verheiratet. Er starb am 14 Dezember 2010 in Guatemala.
Executive director of Computer Professionals for Social Responsibility (1985-1992), founder of the 21st Century Project at the University of Texas, and co-editor of "Computers in Battle: Will They Work?" (1987).