G - Generator O - Operator D - Destroyer
GOD is Brahma Vishnu and Shiva - They take care of just one universe
But There are infinite universes and hence Infinite gods
People think there is only one brahma but once you read Brahama Samhita( Worship of Krishna by Lord Brahma) you know there are multiple brahma and multiple universes created by them / This is also Also Confirmed by Garga Samhita - by Sage Garga - one of the Son of Brahma
GODs are being Created by Krishna the supreme personality of godhead
The orgin of these gods and universes is krishna
Source Brahma Samhita - Garga Samhita
http://harekrishnabooks.blogspot.com/