Everything that the Google search network knows about, or has known about.

Technically the GKU is measured in bytes. However the most familiar measurement of the GKU is in 's.

Knowledge existing outside of the GKU is theoretical. Scientists maintain that there may exist a time period between which knowledge is created and just before it enters the Google search network. Evidence proving the existence of this time period has not yet surfaced.

Certain web developers, designers and [cen. -ed] maintain that they work on projects ahead of the GKU, leaving all Known Universe beings to "eat their dust". [citation needed]