His main research fields are ornithology, entomology, and ecology.
[4] Besides several papers on birds, insects, and ecology, Gibbs contributed to the books Irian Jaya, Indonesia, 21 January – 12 March 1991.
With notes from 1992: A site guide for birdwatchers (1993), Wallacea (1996), and Pigeons and Doves: A Guide to the Pigeons and Doves of the World (2001, with Eustace Barnes and John Cox).
In 1994, Gibbs discovered the Vanikoro white-eye (Zosterops gibbsi) which was scientifically described and named for him by Guy Dutson in 2008.
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