Rory and Lane call out to each other so that Rory can find Lane among the clutter of the overstocked antique store. Marco Polo is a game of tag played in a swimming pool which is similar to blind man’s buff. The player who is “It” closes their eyes and shouts “Marco!”, while attempting to find the other players by their voices, as they respond with “Polo!”. It is not known why the game uses the name of the explorer Marco Polo, and it apparently has no connection with the game of water polo. The game dates to perhaps the 1960s.
The Annotated Gilmore Girls 