He once maintained an early Doctor Who portal on the web, and his main claim to immortality seems to be that he's quoted in the FAQ for the MUMPS computer programming language, of which it would be fair to say he is not a fan. Although you won't find a lot of his work on the web these days, there is an article at CodeProject, and he contributed the first Windows installer for doxygen, though the credit for maintaining it is all Dimitri's.
If you have a Palm Powered® handheld, you can sample Gavin's software development skills and see what the company he works for does by downloading Insights Impressions (freeware). Oh no, you can't, as it's now been withdrawn. Oh well.