What is God's shape or form? How do we describe God? Does He have a shape or form? Is He human-like, a light, or something else? Does He have a shape? What does Christianity say about it?
Mainstream Christianity - Catholicism, Orthodox, and the various Protestant denominations, God doesn't have a form. He is spirit, omnipresent, and not confined to a single place.  He doesn't have a form. (Although He could manifest one and speak through it, such as a burning bush...)

Of course, when He came to earth as Christ (as mainstream Christianity believes) He had a body of flesh.

The above is true of most denominations and traditions within Christianity.

A few denominations do, however, believe that God has a physical body. (One such example, the LDS Church teaches that He has a perfected physical body of flesh and bone).


  God is the Father of our spirits.3 He has a glorified, perfected body
  of flesh and bone.4 We lived with Him in heaven before we were born.5
  And when He created us physically, we were created in the image of
  God, each with a personal body.6