How Did God Get to be God?

How did God get to be God?  Did he take a test, pursue a degree, have a friend in the business?  Was there an internship, a political appointment, an ad in the New York Times?  What were his qualifications?  From whom did he get references?  Or was it that no one else applied?  God's role in life is not a job.  It is his being and so any comparison we might offer, any understanding based on our experience, is not so very helpful.