It seems like there can be a map for any kind of fiction. Harry Potter has his marauder’s map, The Hobbit and Lord of the Rings have a map, and so on. While I have not watched Game of Thrones I like this interactive map, which even have a spoilers control. Another similar, but in my opinion not as exciting map can be found here. I like fantasy maps, which is why I have the Lord of the Rings map I shared a few posts ago on my wall. There is a forum dedicated to making all kind of fictional maps or historic maps, called the Cartographers Guild. The users of that forum have also made many tutorials on how to make your own maps.