So my co-clerk and I decided to go on Thesaurus.com and look for synonyms. Here's what we got for "gal":
babe, bimbo, chick, dame, dish, doll, doxy, female, floozy, gal , girl, honey, lady, lassie, miss, moll, skirt, sweet thing, tootsie.By contrast, here's "guy":
bird, bloke, boy, brother, bud, buddy, cat, chap, chum, dude, feller, fellow, gentleman, individual, male, person.So a "guy" is a "person," but a "gal" is a "bimbo." Okay then.