b) in Quebec French a synonym for the French (of France) term meuf
c) used, with a capital G, as a shorthand for the female name Gertrude.
comment ca va les gerda? (hey, gerda (ladies) how is it going?)
response to post : Ce que tu voulais dire, c'est comment ca vas les meufs. on n'utilise pas le terme gerda en France. (what you wanted to say is, Hey, how is it going les meufs; the term gerda is not used here in France).