The collection comprises undergraduate essays, unpublished papers, drafts of published work, lecture notes and correspondence. The papers range through all of Gibson's academic career in the University of Western Australia, Canberra University College and the Australian National University. The correspondence, of which most is either administrative or university related, includes letters from his father W.R. Boyce Gibson, his brother Alexander (Sandy) Boyce Gibson and fellow philosophers including David Armstrong and Peter Davson-Galle.