Complex sentence: Reruns have been aired on Nickelodeon GAS starting in 1999, making "Get the Picture" the oldest and longest-running show ever aired on GAS after "Finders Keepers" was removed in 2006.
Split into simpler sentences: Reruns have been aired on Nickelodeon GAS starting in 1999. It is the oldest and longest-running show ever aired on GAS after "Finders Keepers" was removed in 2006.