It is mentioned in the original rules, although evidentially either people haven't read them or it's not explicit enough.
Also, Arch, please just keep out. I appreciate that you're not being rude or offensive, but anything involving you and Lantz tends to head that way very rapidly, and if it goes down that path I think that, given how many times you've been warned to keep away, it would be hard to justify anything other than a ban.
As for my vote, despite how silly it seems, I have a feeling that option 3) is actually the right choice here, because I don't think it would be here if the only result was to get Toshi beaten-up by Gil, and Gil is definitely acting bizarrely.
So:
3) Punch Gilgamesh in the face.