Il est marié à Ann Pimlott (1964), avec qui il a trois fils : Alan, Geoffrey et Nicholas. Alan est professeur de philosophie au Swarthmore College. De 1992 jusqu'à la mort de Gordon Baker, la philosophe Katherine Morris (Mansfield College, Oxford) est sa compagne.
Bibliographie
Wittgenstein : Understanding and Meaning, Volume 1 of an analytical commentary on the Philosophical Investigations (Blackwell, Oxford, and Chicago University Press, Chicago, 1980) (ISBN0-631-12111-0, 1-4051-0176-8 et 1-4051-1987-X), co-écrit avec P.M.S Hacker.
Language, Sense and Nonsense, a critical investigation into modern theories of language (Blackwell, 1984) (ISBN0-631-13519-7) co-écrit avec P.M.S Hacker.
Scepticism, Rules and Language (Blackwell, 1984) (ISBN0-631-13614-2) co-écrit avec P.M.S Hacker.
Wittgenstein : Rules, Grammar, and Necessity - Volume 2 of an analytical commentary on the Philosophical Investigations (Blackwell, Oxford, UK and Cambridge, Massachusetts USA, 1985) (ISBN0-631-13024-1 et 0-631-16188-0) co-écrit avec P.M.S Hacker.
↑Staff. "Phi Betes Vote", The Harvard Crimson, November 25, 1958. Accessed November 2, 2012. "Phi Beta Kappa elected the Senior Sixteen in its annual fall election last night. Chosen were Gordon P. Baker of Lowell House and Englewood, N.J."