Gremlin Pumpkins This page first published: Aug 14, 2005 · Modified: May 10, 2018 · by CooksInfo. Copyright © 2020Gremlin Pumpkins are round, about 5 inches (13 cm) wide and tall. They are used as ornamental pumpkins. High yields. Ships well. 100 days from seed. History Notes Gremlin Pumpkins were developed by the Liberty Seed Company. Released 1999.