The Get Along Gang marks its 30th anniversary this year. American Greetings introduced the characters through their subsidiary, Those Characters From Cleveland, and managed to land a television deal. Twice.
The pilot episode was produced by Canada's Nelvana Studios for Nickelodeon, presumably in the first half of 1984. Former Lovin' Spoonful frontman John Sebastian, who'd previously scored some specials for Nelvana, recorded the theme song. However, by the time the fall schedule was announced, the series had switched animation houses to DIC, and was picked up by CBS. That also meant that some of the voice actors were changed. For example, Charles Haid (Hill Street Blues), the original voice of Montgomery Moose, was replaced by a considerably younger actor with a little more cartoon experience in Sparky Marcus (ex-Richie Rich, The Bad News Bears).
Unfortunately, only 1 season was produced at DIC, and CBS kept it around until 1986. Here's the intro to the CBS/DIC version: