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.