Yeah, it returned true and after that when I ran I got the same output. I did have to manually change gingerExtraAdventures to true, but that also didn't solve the problem.
I dunno if you ever managed to get this working but I'm getting the same sort of output:
> call scripts\Gingerbread City.ash
Day 1 of quest "blackmail+raygun"
Overriding midnight choice: "mainstat" -> "Muscle"
Adventuring in The Gingerbread City stops.
Farming sprinkles
Gained 0...