Were ancient gods aliens?

I personally believe that Genesis is not about the creation of the earth, but the restoration of the earth after some cataclymic event caused the last great m extinction of life on earth some 10-12,000 years ago during the Pleistocene-Holocene boundary. There are different varieties of this belief, generally called the Gap Theory, which says there is a great span of time between Genesis 1:1 and Genesis 1:2.