Hi Steve
The following research articles refer to actual or potential use of GAP:
Marston Conder, Hexagon-free subgraphs of hypercubes,
J. Graph Theory 17 (1993), 477-479.
Marston Conder, Regular maps with small parameters,
J. Australian Math. Society 57 (1994), 103-112.
Marston Conder & John McKay, Markings of the Golay code, preprint.
Cheers
Marston