How was the God created?
Or rephrase the question
Who created the God
It is a well accepted, and depending on who you speak to, "proven" axiom of mathematics that a supreme, unique prime exists that generates all space.
In math, that supreme, unique prime that generates all space would be the infinity generator. (Infinity is not a number; it is a generator of all numbers and spaces.)
For God, He is the prime generator - nothing before or after. He generates everything. No one created Him. No one is before Him. It may be hard to grasp because it seems paradoxical. How could everything exist all the time, everywhere - without a well-defined beginning point? That question highlights our painfully inept understanding of things outside of our own knowledge.
Go to the East Coast in 1630 with a lighter, and a hair spray bottle. If you aren't tried as a witch for that technology alone, do a simple chemistry experiment in front of a village or town and spray the mist at the flame. To you, this is simple high school science; to Salem, for example, the
only explanation may be you are a pyromancer. That is just 400 years difference in knowledge. There is a vast gulf between what we know and what even those who have died know. Even more, between them and celestials, and even more between them and archs/powers/archons/judges. And yet, even more between them and God.