The G36 mod has no dependencies besides the base game. It must be loaded on the server and by every player.

Players

1. Open Workshop in the Arma Reforger main menu.
2. Search for G36 (author Maj0rrush) and subscribe.
3. Join a server that runs the mod. The game downloads it automatically when you join.

Dedicated server

Add the mod to the mods list in your server config:

"mods": [
  {
    "modId": "7FF8427C1F231FD3",
    "name": "G36"
  }
]

Leave out version to always load the newest version.