In the series Gumby has a sister called Minga . This led to a new incarnation of the series for television syndication by Lorimar-Telepictures in 1988 that included new characters , like Gumby 's little sister Minga and a mastodon named Denali . Dallas McKennon returned as the voice of Gumby in new adventures that would take Gumby and his pals beyond their toyland-type setting and establish themselves as a rock band .