Good God! That expression doesn't exists only in the English language, because some people actually believe in a good God.
We try to become this good God! The good God of All full of benevolence and goodness!

---Attributes:
God of All: https://godscommunity.boards.net/thread/142/god-all
benevolence: https://godscommunity.boards.net/thread/109/benevolence
goodness: https://godscommunity.boards.net/thread/109/benevolence