Gareth studied creative writing under Tony Curtis and Helen Dunmore at the University of Glamorgan. He has hosted creative writing workshops and guest lectures at schools, universities, and literary events in the United Kingdom and Europe, including:
- Manx Literary Festival
- Aberystwyth University
- Napier University
- Buckinghamshire New University
- Konvencija Rikon, Croatia
- Anglia-Ruskin University
- Bristol Literary Festival
- Loncon 3 World Science Fiction Convention, London
- Bath Spa University
- Cymera Festival, Edinburgh
- Dublin 2019 World Science Fiction Convention
He has also penned About Writing, an essential guidebook for aspiring authors (published by Gollancz in 2022).
