Gilgamesh and Noah

Gilagamesh and Noah have very similar stories. I believe that this is, in my opinon, a result of the story of Noah being retold throught the world. I think that because the bible was written later it often doesn't get credited with the origin of the flood story. I believe that the story of Noah was around before then was heard by the Summarians then adapted to fit thier culture and the moral that they wanted to convey.