Edited for Syndication: The consolation plugs were regularly replaced in reruns, in many cases promoting things that did not exist in 1992 (like Stay Tooned and the Barf-O-Rama books, both from 1996). This practice did not carry over to the GAS reruns; they would air with either a set of plugs from 1997 or (far less frequently) their original plugs.
Hey, It's That Guy!: Joey Fatone (before he became famous) and Melissa Joan Hart (promoting Clarissa Explains It All) were contestants. Fatone would eventually host the NBC version of The Singing Bee.
Keep Circulating the Tapes: The series has not been rerun since the demise of the Nick GAS channel. Even then, despite airing on GAS from its inception to its ending, only 64 of its 84 episodes ever reran there. One of the 20 missing episodes was posted to Nickelodeon's site in the late 2000s, another has been offered for sale on iTunes since December 2013* It's the one titled "Phil Moore Continues Wearing the Hawaiian Shirt", and at least five others circulate among traders. The rest haven't seen the light of day since the 1990s.
One theory as to why those 20 episodes never reran is that Nick Arcade used a lot of music videos in their puzzles, and GAS couldn't clear (or didn't feel like clearing) the music rights for every episode. While the theory has never been confirmed, it's interesting to note that 7 missing episodes have been found so far, and all of them featured a music video.