Not if God created time.
What a nonsensical idea. Creation is an action that requires time in which to occur. I.e. It's an act that occurs within time. For god to commit the cause-effect act of creating time, he would need to exist within a time dimension of his own. It's like saying glass was invented by a window, it's meaningless and in your case useless as it's also totally unscriptural. The idea of something existing outside of time is square-shaped circle-level meaningless. Existence requires time
So again, what caused god? There's no sane way of ducking that question, not that sanity has much involvement in Christian apologetics mind you