Question: When was the Rob Renzetti the supervising producer for Gravity Falls?
Sentence (from "Gravity Falls: Legend of the Gnome Gemulets"): Gravity Falls: Legend of the Gnome Gemulets is a platform video game for the Nintendo 3DS, developed and published by Ubisoft and produced by Disney Interactive Studios based on the animated Disney series, "Gravity Falls".
Relevant evidence: No