G
Glass
Not the most ergonomic way that humans have ever developed to serve water to cats, but still useable.
Photo by ButterflySha
Goat
Goats can be used as heat sources for a cat that is feeling a little chilly.
Photo by hoyasmeg
Goose
Geese are apparently birds. Birds are supposed to be small and crunchy. Geese are too big to be crunchy. Thus, geese are not birds.
Photo by zenera
Green
Green is a standard cat eye colour. Like blue. Humans mostly have brown eyes and are jealous of cats.
Photo by Ernst Vikne