Before we can question whether or not a god or gods or any similar entity exists, we have to first question our concept of god.
Then we have to question whether or not we possess the perception or tools to perceive a god.
The limitations of our accepted tools of knowledge is for a 3d material universe.
I am with LordZuko, first we must come to a definitive conclusion about what constitutes 'god' and then decide if that god does indeed exist. If the bible is the basis of 'god', then based on the fact it has been plagiarized and bastardized the answer is no, that god does not exist.
Except the bible isn't plagiarized it simply comes out of the same cultures that created it