It used to be used on my server, but since I don't use it anymore, I decided to share it
It provides a simple display GUI creation function, I use it to display custom recipes, you can do anything with it, like display crate items
Note that if the red stained glass pane item is present, clicking it will execute a custom console command (such as returning to the previous menu). You can edit this in the config file.

commands：
/guishow edit <titlename> <row> - create new gui
/guishow edit <titlename> - edit GUI
/guishow view <titlename> <player> - Show the gui to the player
/guishow reload - reload plugin