Stupid question, Is Digital electronics the subject that focuses on GPUs?

I want to work in a manufacturing plant for GPUs and on the GPU page on Wikipedia it says GPUs are a Electronic Circuit and on that page it talks about Analog Circuits/Digital circuits and mixed signal circuits.

https://en.wikipedia.org/wiki/Graphics_processing_unit
https://en.wikipedia.org/wiki/Electronic_circuit

I would imagine there are a lot of subjects that are relevant to developing GPUs - computer science, industrial design, art, engineering, electronics/physics.