Provided is a canola variety designated 18GG0660G and seed, plants and plant parts thereof produced from a cross of inbred varieties. Methods for producing a canola variety comprise crossing canola variety 18GG0660G with another canola plant. Methods for producing a canola plant containing in its genetic material one or more traits introgressed into 18GG0660G through backcross conversion and/or transformation, and to the canola seed, plant and plant part produced thereby are described. Canola variety, the seed, the plant produced from the seed, plant parts and variants, mutants, and minor modifications of canola variety are disclosed.