Team Logo. The Pocatello Giants were a team in the Pioneer League. They were the Rookie affiliate of the San Francisco Giants. In 1990 they changed their name to the Gate City Pioneers. Retrieved from "https://prosportsteams.fandom.com/wiki/Pocatello_Giants?oldid=16546" Categories: Former PL Teams Teams in Idaho Teams in Pocatello Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.