God is the creator of Earth and all that exists. After destroying the world the first time by the means of a flood, as stated in Genesis, in the first chapter: "it was dark on the face of the deep: and the Spirit of God was hovering over the surface of the waters." God then establishes and initiates the seven days of creation and creates humans as well as other living animals. He then creates several species of secret, intelligent beings and instructs them to remain in secret from mankind. (An example of this are Angels) The rest of what he does is in the Bible. Though he does not speak in any of his usual forms in the New Testament besides the form of his son, Jesus Christ.
In the Garden of Eden, he was shown to have no idea as to where Adam and Eve were when they hid from him, but do to being an omni/Amortal Existant Being, he knew of every single event that will ever happen, despite pretending otherwise.