After installing GhostBSD I added a user using the adduser (8) command. For this user I set the Use password-based authentication? option to "no". Everything else about this user is normal.
When I rebooted and attempted to access this user (with the usual graphical login screen), I could not. A blank password is rejected as well as all other passwords. Even after using ctrl+alt+f2 to access the Command Line Interface, it acted as if it had a password and would not let me in.

After poking around I found a solution. Using pw moduser $USER -w none fixed it, allowing me to log in without a password.

Is this an issue with GhostBSD or is this a feature of adduser that I was unfamiliar with? I had assumed the password would be blank rather than locked out when setting password authentication to no.

Setting the password authentication to no will not let you log in.

Also, adding a user with an empty password is not secure, but it is up to your choice.

I had the same issue. I don't like having a user password for some systems. But it failed on FreeBSD/GhostBSD.