Is there any evidence that "God is real"? Is it a fact, or a mere belief?

It's a belief. People choose to believe or not. So it's a choice that one makes. There is no evidence that a God exists. Religions ask or tell you to simply "believe," or have "faith." That's not proof. It's an idea and one chooses whether or not to go along with that idea. You are not given actual evidence because there isn't any to give. It's all based on faith (belief).