G
- Menna Gallie
- Place of Birth: Ystradgynlais, Breconshire
- Dates: 1920-1990
- Strike for a Kingdom (1959)
- Man's Desiring (1960)
- The Small Mine (1962)
- Travels with a Duchess (1968)
- You're Welcome to Ulster! (1970)
- John Garden: See Harry Lutf Vern Fletcher.
- Glasynys: See Owen Wynne Jones.
- William Glynne-Jones: See William Glyn Jones.
- Geraint Goodwin
- Place of Birth: Newton, Montgomeryshire
- Dates: 1903-1941
- Conversations with George Moore (1929)
- Call Back Yesterday (1934)
- The Heyday in the Blood (1936)
- The White Farm (1937)
- Watch for the Morning (1938)
- Come Michaelmas (1939)
- George Alexander Graber (Alexander Cordell)
- Place of Birth: Colombo, Ceylon
- Dates: 1914-1997
- A Thought of Honour (1954)
- Rape of the Fair Country (1959)
- The House of Rebecca (1960)
- Race of the Tiger (1963)
- The Sinews of Love (1965)
- The Bright Cantonese (1967)
- Song of the Earth (1969)
- The Fire People (1972)
- If You Believe the Soldiers (1972)
- The Dream and the Destiny (1975)
- This Sweet and Bitter Earth (1977)
- Sea Urchin (1979)
- To Slay the Dreamer (1980)
- Rogue's March (1981)
- Land of My Fathers (1983)
- Peerless Jim (1984)
- Llewelyn Wyn Griffith
- Place of Birth: Dolgellau, Merionethshire
- Dates: 1890-1977
- Up to Mametz (1931)
- Spring of Youth (1935)
- The Wooden Spoon (1937)
- The Way Lies West (1945)
- The Barren Tree (1945)
- The Welsh (1950)
- The Adventures of Pryderi (1962)
- William John Griffith
- Place of Birth: Aberffrau, Anglesey
- Dates: 1875-1931
- Storiau'r Henllys Fawr (1938)
- Yr Hen Siandri (????)
- John Griffiths
- Place of Birth: Treharris, Glamorganshire
- Dates: 1907-1980
- Griff and Tommy (1956)
- Griff and Tommy and the Golden Image (1964)
- William John Gruffydd (Elerydd)
- Place of Birth: Ffair-Rhos, Cardiganshire
- Dates: 1916-
- Ffenestri (1961)
- Hers a Cheffyl (1967)
- Cyffwrdd â'i Esgyrn (1969)
- Angel heb Adenydd (1971)
- Cerddi'r Llygad (1973)
- Arthur Gwynne: See Gwynfil Evans.