From Longman Dictionary of Contemporary Englishgalgal1 /ɡæl/ noun [countable] American English informalWOMANCHILD a girl or woman – used especially by older people She’s a great gal.
Examples from the Corpusgal• And she never was an assassination gal.• Gan played Nintendo and his gal ran and grabbed the best tent site.• All those sweet little gals in white uniforms.• Got up there and got tied up with one of them Mississippi gals and one year led to two led to five.• Gee! what a swell gal she is.• One of the gals on the board has uh some how to stuff got to get that from her.• A couple of them gals were real beauties.galgal2 British English, gal. American English TMthe written abbreviation of gallon or gallonsFrom Longman Business Dictionarygal.gal. (also gall British English) written abbreviation for GALLONOrigin gal (1700-1800) girl