I’m terrible at explaining things, so I’ll do my best. But if you want a more detailed explanation go here.
Basically, GISHWHES stands for The Greatest International Scavenger Hunt the World Has Ever Seen. It’s a scavenger hunt which was created by Misha Collins and is basically just a fun, silly scavenger way to have fun. You have to pay an entrance fee ranging from $10 for simple memebership to $269 for a digital pack made by Misha for you. During the week of the scavenger hunt you must collect as many items on the list as possible, these things will range from "Take a picture of you hugging a war veteran" to "a fully dressed storm trooper cleaning a pool next to a sunbather". The items are uploaded digitally. You may either join a team of 15 people [coughs] my team has 2 openings [coughs] or enter individually and be put in a global team. Whoever gets the most items off the list gets to travel to Canada to be joined by Misha to then go to a trip on an island off the coast of Vancouver where they’ll spend 3 days I believe. So yeah, it’s just a silly fun way to keep active and meet new people.