There is an updated pull request by toluschr against master on the void-packages repository

https://github.com/toluschr/void-packages new-gamemode
https://github.com/void-linux/void-packages/pull/22291

New package: gamemode-1.6
I'm reopening this, since I'm still interesting in having this package in the VoidLinux repos and the last three times a PR was opened for this, it didn't get merged. #19281

A patch file from https://github.com/void-linux/void-packages/pull/22291.patch is attached