Setting up a Fretta Server?

I have NO idea how to :/. I have downloaded a bunch of folders for fretta game modes that each have a Content Folder, Entities Folder, and gamemode folder, and an info.txt. Where do i place these? And how do gamemodes switch in Fretta? I cant find an installation thread about fretta anywhere if someone could help me thatd be really cool.

You place the folder which contain the content folder, entities folder, and gamemode folder in the gamemodes folder in you garrysmod/garrysmod folder.

1)Go to you gmod/gmod folder
2) Look for the gamemodes folder in there
3) Put the folder that contains all those folders and files in there
4) The fretta server should load it up if it’s installed right.