How to upload prop/model to Garry's Mod workshop

To keep this short, I have the following file types I’d like to upload to the workshop as props/models. I have: .mdl .phy .vtx .vvd I’ve watched some tutorials and read some guides to no avail, as far as I know I need to make these into a .gma archive but not much more. Anything helps, thanks.

This should give you a good enought insight on how to do it.