It looks like Mallumo was response #1 and then Entropy weighed in later and agreed. As far as "Will Judgement of Loec go in the discard pile at the end of the turn if I used Gathering the Winds to play it?" I think the answer is no. It's obvious, to me, that the FAQ citation about Gathering the Winds is referring to spells in the discard as the card type "tactics", which most of them are. If you play a spell out of your discard, and the spell were a tactic, that FAQ is just telling you to discard it as you usually would play a tactic. That's what Gathering does: let you play cards from your discard pile that are "spells", most of which are tactics, as if they were in your hand and you played them as normal.
The added language in the FAQ of "…then discard it" is seemingly purposefully redundant so that people don't think, for some reason, that the tactic would not return to the discard pile. Unfortunately, there is now a situation where some could argue support cards should go to the discard pile because they were played by Gathering. Anyway, that answer is not going to be satisfying to people who will repeatedly point at the FAQ and say "There, it says right there to discard the spell", as if spells are now their own magical type of card when filtered through Gathering, regardless of the original card type. So hopefully they change the FAQ the necessary two words to resolve this unnecessary confusion either way.