Yes GunZ is dying since year 2011 since the source code was released.
Lot of official server closed and lot of private server have opened and just closed after few months or a year.
And yes, I agree with secondary. If GunZ will be added to Steam if very possible, there might be thousands or below thousand of oldgen players that will come back to play GunZ in Steam even how bored because there might be an excitement rolling their minds and lot of some newbie to meet up.
And yes, I agree with Arcelor that custom items made and maps are just worthless in the end as we see in all private servers.
And yes, I agree with SKNeoDio that this GunZ Private Servers is for money purpose, but that's just a nature of life.
SecretsOThePast is stongly correct, the game is largely dead. And yes, move on, make a own game coding from very beginning till end.
For me, Gunz is my favorite game among all online game. The games I played are rakion, crossfire, warrock, soldier front / special force, but GUNZ is the BEST for me!
My brothers knows playing GunZ too, and pro enough in playing, but they are bored in GunZ and never went back to play. 1 playing RO and the rest are Dota2.
Some developer wanted to be part of developer in Popular GunZ Server which has a large count of players or just to be part of staff even in just a small count of players, but if they won't be part of it, they are desperate, and will make on their own, that's the reason they are trying to make a server.