No, but it may be an important component. Imagine trying to spend a week without any information. No books or broadcasts, no entertainment or news. No communication with another person, whether written or spoken or visual or just touching. It would be a diminished kind of existence. That is why extended solitary confinement is such a terrible punishment. Information plays a vital role in everyday human life. But to what extent is information the basis of reality?
Not in any direct way. That is, it doesn’t provide an argument for the existence of God. But it does so indirectly, by providing an argument against the philosophy called materialism (or “physicalism”), which is the main intellectual opponent of belief in God in today’s world.