My NVIDIA GPU isn't showing up

I'm trying to change my GPU used on the emulator, because I don't want to use an Intel one.

I want to change it to a NVIDIA GPU. But it doesn't show up whenever I go to the GPU section of the settings.

My GPU is a NVIDIA GeForce GTX 710M. It performs well for me in Half Life 2. [on Steam, not the emulator.]

Please tell me ASAP how to fix this. 

Here's a screenshot to prove that I can't select my NVIDIA gpu.
   

As it says on your screenshot, GPU selection is not needed and can't be for OpenGL as it's automatic.
It hints the driver to select the dedicated GPU by default.

This GPU does not support Vulkan, so OpenGL would be your only option for this.