Wow. Gilgamesh was named in ancient documents. So were Apollo, Zeus, Uhuru Mazda, Oedipus, etc., etc. You think they were all real, too?
Moses said he existed, and given that such information is so rare, I'll accept that he existed, or another guy with the same name existed.
In Moby Dick, the narrator said, "Call me Ishmael." Do you think he existed, too?
Nobody said Zeus was "people" ~
YOu said you are "WildHorseCrash". Now, prove to me that you are real.