"Maoism" isn't the ideology of Mao, but a deviation made by Gonzalo.
You mean, like, in the same way that "Marxist-Leninism" isn't the ideology of Marx, but a deviation made by Lenin? (i.e., not Marxism).
What were Stalin's innovations over Leninism?
Well for one thing, you say he coined the term that people today use to refer to Lenin's ideology (not Marx's, which is just "Marxism").
For another thing, there's literally everything that people like you ever say was "Stalin's fault, not Lenin's" when attempting to derail conversations away from "bad shit that happened under the USSR."
Beyond that, I'm getting bored with you and I don't feel the need to go dig up information that literally anyone can find easily, just to prove a point to someone who will ever accept facts and logic.