G
- G.I. Joe Action Stars – Ralston (1985)
- Ghostbusters Cereal – Ralston (1985 -1988)
- Ghosterbusters II Cereal – Ralston (1989)
- Go Lean Cereal (Crunch) – Kashi
- Golden Crisp (formerly known as Sugar Crisp) – Post Cereals (1949 – present)
- Golden Goals - Quaker
- Golden Grahams – General Mills (1970s-Present)
- Golden Nuggets – United Kingdom – Nestlé
- Golden Puffs – Malt-O-Meal
- Good Friends Cereal (fiber cereal)- Kashi/Kellogg's
- Gorilla Munch – Nature's Path
- Granola – Kellogg's (1900s (decade))
- Granolove - (honey roasted granola) Springfield, MO
- Granula – First manufactured Breakfast Cereal invented by James Caleb Jackson in 1863.
- Grape Nut Flakes – Post
- Grape-Nuts – Post Cereals
- Gremlins cereal – Ralston (1984)
- Grins & Smiles & Giggles & Laughs – Ralston (discontinued)
- Guardian Cinnamon with a hint of vanilla flavour – Canada – Kelloggs
- Guardian Original with a hint of maple flavour – Canada – Kelloggs
Read more about this topic: List Of Breakfast Cereals