Steve, I don’t see how that implies that God is “outside of time.” Indeed I see no meaning whatever to someone existing “outside of time.”
Yes, I do see why it is difficult or impossible for us finite human beings to understand how God could bring about His first act of begetting His Son. But it makes less sense to think of Him having done it “outside of time.” Time is not some ethereal substance outside of which there is no existence. Rather time is a way of measuring the temporal “distance” between events. There was no “before” that first act of God’s, and thus there was no time. The very word “before” indicates a time. The question as to whether God existed “before” the beginning of time is meaningless. The question as to whether God exists “outside of time” is also meaningless.