This season is arranged as the show was originally released. Names and episode numbers for syndicated cuts are listed in the notes. The original 1956 run, includes all episodes up to an including "In a Fix." A revival of the show in 1960 produced 87 new episodes and re-cut the majority of the episodes of the original run into shorter, stand-alone segments. These new cuts sometimes included new animation added to allow these shortened episodes to function without its counterpart. The revival is not explicitly a second season, though an argument could be made that it should be treated as one, it is treated as a single season here. Similarly, Gumby Adventures (1988) could be seen as a third season, but is a distinct show.
Gumbyworld.com lists episodes in the re-cut form, however the widely available home video releases of the show are delivered in the original cuts and the episode list as displayed here is much more relevant to those more widely available Gumby distributions.
