NAICS Code(s) 311613 (Rendering and Meat By-Product Processing)

You are processing it so I would go with food processing.

It is about meat processing

The Graphics Processing Unit (GPU) handles rendering and processing graphics displayed on a computer. It works in conjunction with the Central Processing Unit (CPU) to handle tasks related to displaying images, videos, and animations on the screen.

Gold and plant food processing are totally different and they are never run at the same place. Food processing plants are considered to be sensitive since the food is consumed by humans.