- Gaiety (s) - Bicolour. 1946.
- Garden News (s) - Scarlet. 1999.
- Garry Kirkman (s) - Orange Red. Parsons.
- Gemini (s) - Pale pink, white ground. Place, 1999.
- Geoff Amos (s) - Crimson fancy. 1999.
- Geoff Hamilton (s) - Mauve. 1997.
- Geoff Hughes (s) - Orange stripe. Sarrer, 2009.
- George Priestley (s) - Intense mauve flush. Priestley, 2009.
- Georgina (s) - Lavender. Manning, 1977.
- Geranium Pink (s) - Orange red. Stark, 1953.
- Gerry Cullinan (s) - Lavender, cream ground. Kerton, 2007.
- Gigantic (s) - White. 1933.
- Gipsy Queen (s) - Crimson. 1965.
- Glacier (s) - White. Harrod.
- Glasnevin (s) - White. Harrod, 2006.
- Gloria (e,m) - Deep rose EMG.
- Glow (s) - Orange/pink bicolour. 1997.
- Gorleston (s) - Mauve. 1986.
- Grace (e,m) - Lavender EMG.
- Grace of Monaco (s) - Rose pink, white ground. Williams, 1985.
- Gracious Lady (s) - Pale pink, cream ground. 2003.
- Grandma Butt (s) - Rosy magenta. Beane, 2006.
- Great Britain (m) - Rose pink, cream ground. 1966.
- Great Expectations (s) - Lavender. 1994.
- Grenadier (e) - Scarlet Spencer Praecox.
- Gwendoline (s) - Rose pink, white ground. Kerley, 1999.
- Gypsy Queen (s) - Crimson. 1965.
- Gypsy Rose (s) - Rose pink, cream ground. 1984.