Parodies Mormons which will eventually lead to Trey Parker and Matt Stone's successful Broadway/West End musical "The Book of Mormon".
In the episode when they are telling how the Mormon religion was created they used to post text on the screen that says "This is what Mormon's actually believe". That text is missing from syndication because of legal reasons since this is a bit of an embellishment of how Mormonism was founded.
Gary's family is playing a board game called "Living." This is a parody of the board game "the Game of Life."