When you create a hunt, the locations of your clues and the location where you initially created the hunt will be included in the hunt’s information. In addition, when you play a hunt, and override a clue, the location is stored.
We do use your GPS to make the game work, but only send this information back to our servers when strictly necessary. For example, when finding nearby hunts, we need to do a query based on your location. In these cases, we don’t track the information.