Feature request: Cleaner GPU naming scheme

[cpebble]

I know this is a small commit and i should be able to write the PR myself, however i wanted the devs input beforehand.
Currently, the GPU name is generated by appending a ".index" to every gpu. When only running one GPU i think it would be cleaner just to have the gpu name as is.

Would this be acceptable, or break the design philosophy?

[xxxserxxx]

I agree this would be an improvement.

I don't have an nvidia card to test anything against, so while I can perform reviews, I'm unable to test myself. I'm thrilled to have PRs as otherwise I'm programming mostly blind on this.