Great diagrams there. Curious, though, why the other side of the pyramid wasn't used instead of the GG: a lot more room; no place for accumulation of the counter-weight product to hinder progress; and height restrictions are not a factor - blocks keep getting lifted far and above the GG height.
In consideration of the slots/notches/cavities aligned along the sides of the GG ramp and in the wall, there is a possibility that not all of them were used.
"In fact, upon examination, it turns out that the plugged cavities on the south side are all genuine, while most of the plugged cavities on the central part are fake and the plugged cavities on the north side are genuine."
Splitting the GG into three parts of north, central and south, the central part is here identified as being different to the areas either side of it, so possibly no full use of the GG for such block moving. The southern and northern areas were set up to 'do the work'.