This repository contains the GUI related files included in the .pkg installer at https://github.com/mabam/afpfs-ng-mac/releases .
"Library/Scripts" and "usr/local" contain GUI related files and folders at the locations the afpfs-ng-mac .pkg installer writes them to the boot partition.
"source" contains the uncompiled scripts of two of those files (I used Platypus for compiling afpfs-ng-mac.mount_cmd.command).
"source/post-installation script" contains the post-install script built into the .pkg installer.