Gastroserica pickai is a species of beetle of the family Scarabaeidae. It is found in Vietnam.
Adults reach a length of about 8.1-9.4 mm. They have a yellowish brown, egg-shaped, oval body. There are sometimes two symmetrical stains on the disc of the pronotum. The dorsal surface is nearly glabrous, except for the cilia along the margins.
The species is named after one of its collectors, J. Picka.