George François Cornelis Griss (30 January 1898, Amsterdam – 2 August 1953, Blaricum), usually cited as G. F. C. Griss, was a Dutch mathematician and philosopher, who was occupied with hegelian idealism and Brouwers intuitionism and stated a negationless mathematics.
Griss was a student of L E J Brouwer and formulated an intuitionism based on a hegelian idealism. He obtained his PhD with Roland Weitzenböck at the University of Amsterdam in July 1925. He was largely influenced by L E J Brouwer, Gerrit Mannoury, Carry van Bruggen and Gerard Bolland, who brought hegelian thought to the Netherlands. He published a number of articles about a negationless mathematics and one small book about idealistic philosophy, called 'Idealistische Filosofie' (February 17, 1946, Gouda) in which he lays down a typically hegelian idealism, and incorporates elements from Bergsons Creative Evolution (L'Evolution créatrice).