Question: what is a gg horse?
Answer: GG or gee-gee is a word for horse used by children or in colloquial speech in UK. ... Wikipedia says that the term "Gee-Gee" is taken from horse-racing where a Gee-Gee is the first horse out of the starting gate. Other sources say that GG is short for the command given to horses to go: "gee up".