We invite you to contact us, and look forward to hearing from you. GAL’s main number is toll free. All calls are answered by our. Seen and Heard. What made you want to look up gal? Please tell us where you read or heard it (including the quote, if possible). Gal, an alteration of girl, is a casual term for a woman. Gal may also refer to: Define gal. gal synonyms, gal pronunciation, gal translation, English dictionary definition of gal. n. Informal A woman or girl. n. The centimeter-gram-second unit of. 34 definitions of GAL. Meaning of GAL. What does GAL stand for? GAL abbreviation. Define GAL at AcronymFinder.com Gal definition, a term used to refer to a girl or woman. See more.