In a microwave, melt candy coating; stir until smooth. Dip 1 pretzel in candy coating; let excess drip off.
Place on waxed paper-lined baking sheet. If desired, fill pretzel holes with candy coating. Decorate with orange sugar or sprinkles. For stem, dip the back of 1 gumdrop piece into candy coating; place above the pumpkin. Repeat. Let stand until set, about 30 minutes.