General Relativity is not free license for you to insert any explanation that accommodates your belief system. It is a precise mathematical theory with precise formulas that predict precise outcomes. We can calculate the predicted time dilation effects due to the gravity of the earth, sun and moon. The results do not support your assertion. We know this for a fact as out current GPS satellite system relies upon these computations in order to achieve the precise accuracy we've come to expect from our navigational devices. If our understanding on this was wrong in anyway, GPS simply would not work.
Of course your calculations wouldn't be the same as mine.
My calulations support my assertions and my guesses.
Therefore, when he was gone out, Jesus said, "Now is the son of man glorified in him."