God did not tell us how He was made. He just said He was....is....and will always be. The Bible says that if He had told us everything there would not be enough books to hold all the information. He says its written in our hearts to know and that we can look around us & see all that He made. Thats why all mankind knows there is a God. Even a nonbeliever spends his whole life trying to say there is not a God. If it didnt bother him .. He would just fly right by a answer like this one.
God, whichever god one believes in, and where he/she/it came from is not a matter of knowledge. Humanity doesn't have the capacity to "know" such things. That's where faith comes in; we have faith and that's all we have.
No one made God. He has always existed and always will exist both before and after the time and space in which we live. God did enter our time and space once about 2,000 years ago. He took on human form as the man Jesus Christ and died on the cross for our sins. When we accept God's offer of forgiveness, he gives us the privilege to live with him in eternity.