Does Proton's wine accept workarounds for non steam games?

[Bitwolfies]

I ask as I would like to add a similar patch to this #179 for Metal Gear Solid 1's GOG release, but since it's not on Steam I have no idea if its acceptable. And as all main forks of Proton pull from here directly I can't patch those projects individually.

Understandable If the answer is no, but I would just prefer to ask before making a PR.