Above is the God of the Bhagavad-Gita, Lord Krishna (completely described and known)
Above is the God of the Holy Bible (not described – unknown)
Above is the God of the Holy Koran (not described – unknown)
“The whole cosmic order is under Me. Under My will it is automatically manifested again and again, and under My will it is annihilated at the end.” (Lord Krishna, Bhagavad-Gita 9.8)
“Furthermore, 0 Arjuna, I am the generating seed of all existences. There is no being-moving or nonmoving-that can exist without Me.” (Lord Krishna, Bhagavad-Gita 10.39)
“Because I am transcendental, beyond both the fallible and the infallible, and because I am the greatest, I am celebrated both in the world and in the Vedas as that Supreme Person.” (Lord Krishna, Bhagavad-Gita 15.18)
As you can see above, God is One.