Not meaning to come across combative but you compare him to Mane and then correctly highlight a few major attributes that he lacks (movement, finishing, technique, aerial prowess, dribbling(my addition)) in comparison.
I think Gordon plays like a better Jacob Murphy, grafters who both play head down and direct with the ultimate intention of getting a shot off. He lacks the all round game (due to his technical limitations) to be compared to Mane imo.