Gymnodoris rubropapulosa is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae. It was first described in 1828.
This species is known from the tropical Indo-Pacific Ocean.
Gymnodoris rubropapulosa is a large dorid nudibranch up to 60 mm in length. It has a white body covered with many orange spots, an orange mantle-edge and orange-lined rhinophores.