OK,,,,, 1... the Gap theory originated because of a different definition of the word "was". the Gap theorist believe that its definition should be "had become". Appears to me they are grasping at false straws.
We Know that the Angels saw the earth Created and we know that Satan fell prior to Genesis 3:
The earth (land) was created in Genesis 9. In Genesis 1: 2 "And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters." Notice the Spirit of God moved upon the face of the waters. So it was Dark (and we know the Dark was a special kind of dark), the Earth(land) was without form and had nothing on it (in fact it was not there as we find out later). All that was there is water (the Deep which is later called the sea).
As far as evolution is concerned
one has to die to evolve). In other words, our bodies as all other life forms bodies are in complete harmony. One thing out of wack and you die. How do you evolve if you are dead?
As far as dinosaurs are concerned. The Congo is the last place on earth besides the "sea" where dinosaurs could live without being seen. The natives in this area speak of a giant monster(s) killing their people, etc. So far, the forest has refused to give up any information to the truth of these stories.
remember all land animals with the exception of those on the ARK died during Noah's Flood. If there are any dinosaurs left they would be in, around the sea or water. Oh, one other idea to ponder.. Up until the flood, God tells us that all live was a herbivore (plant eating). Yes, including the lion. Where did T-Rex come from? Time to read up on Genesis 5..
My opinion about evolution is that it is a lie that people in power tell us. Why? Do you really have to ask?
Like all lies, including those told about Genesis 1, it is calculated strategy to separated us from Jesus Christ. You might ask but I hope you don't have to: (Who would do such a thing)? Like someone once said " if you do not believe in Genesis 1:1 then you got bigger problems to worry about than a Gap theory.