He’s using the term loosely, I believe. If he’s a Christian of any knowledge, he knows that there is no other God but the Lord they God.
________________________________________________
Doesn’t God implicitly acknowledge the existence of ‘other gods’ in the First Commandment?
Even the commandment, "There shall be no other gods before me," is an admonition to refrain from worshiping these "gods" (and a de facto admission that they exist).
Metaphorically, yes.
You have the Lord thy God.
Then you have any people or objects that may lead you astray from God. Those things that can lead you away from God are gods. They can be inanimate things like money, or a person like a politician who leads you astray or a fallen angel that you obey.
What God is saying in the First Commandment is that He is first on all things. When you obey Him, you are worshipping Him. If you allow something to come between your obligation to obey and you do that instead, you have placed a god in front of God.
So, if it’s Sabbath or Sunday morning and you should be in church, but you choose to go to work instead, you’ve made your work a god. Sometimes it can’t be helped. But it is when it becomes a habit, or an excuse so you don’t have to obey that you’ve taken your act of worship from God and have placed it on something or somebody else.