If God is the creator, who created him and how did he evolve?
Rather too many questions and assumptions bunched together here Kate!
Your question firstly requires an explanation of the validity of a number of things before a rational answer could be made including: a; the existence of spirit gods b; the ability of spirits to make things c; the ability of a spirit god or gods to make everything d; the origin of spirit gods, e; can spirits evolve?
Where is the concrete evidence for belief in spirits or gods outside of the impressionable human imagination? How are we ever to know about things which we cannot sense in any way, even if we use instruments to amplify our five senses?
God is a ‘thing’, it is resolutely unknowable and therefore I suggest, irrelevant to the future of mankind.
I suggest the "creator" error lies in a childish mistake in assuming
that 'persons' make all things. Some things do evolve and most easily of all do ideas
evolve notably the concept of God.
YHVH began as an ox-headed god, one of the seventy sons (seventy male offspring was a must for all patriarchs!) of the God El whose consort Ashera later became identified as the son Yahweh’s consort. (It happens all the time in myth). So starting as an idol in the Canaanite pantheon, Yahweh evolved, as society evolved, through henotheism (worship of one god among many) towards monolatry (worship of one god) to a recent incarnation becoming associated with the brand name of the Watchtower Society god Jehovah. The WT having borrowed the name from earlier religious thought and made it a dominant idea to suppress the prominence of Jesus and the trinity doctrine to enhance their own identity in the religious marketplace.
Who created the creator?
The human mind is the creator of God.There are good neurological reasons within the architecture of the brain born from mammalian evolution which have given rise to it. A satisfying elucidation of which cannot realistically be reduced to a sentence or two.