The question of : Who created God is based on a misunderstanding which mixes between the creatures and The Creator. Every creature needs a creator. If you want to claim a creator who created The Creator, you will face the same question of: Who created that creator? Then who creator him and will continue to no end. You have no way but to submit to the fact that there must be A Creator Who was never been Created but He Created every creature.
'The reason leads that there must be a creator who was never been created.
Wassalam.