No, Good and Plenty does not contain any gelatin. I looked on the box and it says it contatins resinous glaze, and I thikn that might have gelatin but most likely not.
A Horn of Plenty is specifically a "surprise bundle", and the contents are 100% random so there is no way of "getting something good". If you are not happy with the contents of the HoP you open, just...
well depends if someone is lying or not but usually it is....... drum roll please BAD! when someone asks someone something the other person thinks its horrinble but they come out with eh good ! but...