**** no - completely different.
Nope, an agnostic, literally, is one who does not know anything about the existence of a god - a very weak position to argue from. It is more likely that someone who is "agnostic" is really an agnostic atheist or an agnostic deist. Atheist and deist deal with what you believe, gnostic and agnostic deal with what you know. Please educate yourself before making claims - the definitions are not that hard to understand but most people misinterprate them. Also, just so you know, I am an agnostic atheist - id est I do not believe in a god or gods but cannot definitively say that there is no god with one-hundred percent certainty.