As far as I know there are three different ways to say "
thank you" in
Korean. Two of them are polite and for anyone who's taken a
foreign language, there is a polite way to address an
elder.
The first is "Gam sah habb nee dah." This is considered a polite.
The second is "Goh mabb subb nee dah." Nothing is different in meaning, just a different way of saying it like "Hey" and "Howdy."
The third is to one of your
peers. "Goh mah wuh."