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- Richard Gaisford, GMTV presenter and reporter who trained at University College Falmouth
- Susan Elizabeth Gay, chronicler of Falmouth
- Richard Gendall, linguist and musician
- Ken George, scholar and Cornish nationalist
- Davies Gilbert, applied mathematician and technocrat, President of the Royal Society
- William Golding, novelist
- Gorlois, a mythical Duke of Cornwall
- Winston Graham, novelist, author of the Poldark series
- William Gregor, clergyman and scientist, discoverer of titanium
- Daniel Gumb, mathematician and stonemason who lived in a cave near the Cheesewring at Linkinhorne
- Sir Goldsworthy Gurney, inventor of limelight
Read more about this topic: List Of People From Cornwall