Micheal Sundman, also known as Gaijin Goombah or Gaijin Goomba, or simply GG, is an American cultural edutainment YouTuber and is the host of two shows on The Game Theorists. Michael's original show on the channel, Game Exchange, started and is still active on his personal channel and is focused on discussing cultural references in and inspirations for games. Its GT replacement, Culture Shock, began as culture videos between episodes of Culture Shock that did not warrant an entire episode of the latter, but grew to replace it altogether.