Q: Are there more Gods than one?
A: There is but One only, the living and true God.

Deuteronomy 6:4. Hear, O Israel: The Lord our God is one Lord.
Jeremiah 10:10. But the Lord is the true God, he is the living God, and an everlasting king: at his wrath the earth shall tremble, and the nations shall not be able to abide his indignation.

Westminster Project - For more info check out this sermon from Thomas Watson's Body of Divinity