Gastroserica guizhouana is a species of beetle of the family Scarabaeidae. It is found in China (Guangxi, Guizhou, Hunan, Sichuan).
Adults reach a length of about 8.2-9.2 mm. They have an iridescent, chestnut brown, egg-shaped, oval body. They are nearly glabrous, except for some setae on the margins of the pronotum and the elytra.