Like Ghost profile now you can create Facebook Ghost Group as well.
Ghost group means a group without any name.

To create the Ghost group follow the steps:

1. Go to https://www.facebook.com/ and Login to your account.
2. Click the arrow given at the right corner and click "Create Group"

3. In the Group name Copy and Paste "xﱞx".

4. Remove both "X" and click "Create Group" after selecting the members

5. Select the Icon.

6. And you are Done :)

How to Make Facebook Group without any Name