GUI Application doesn't run with root access

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Hi all

When I try to Run a GUI application as root ( like : sudo gparted ) I receive some thing like this :

No protocol specified

(gpartedbin:2710): Gtk-WARNING **: cannot open display: :0

I have one root user, that's all.

I searched a lot, There was too many question about it and no great answer to help, so I decided to ask it here hope for a good answer to help other people too.

and I kinda curios about the reason of this problem.

If you think there is not enough information just comment what you need to know.

and the last things I remember I done where simple updates and mess with gnome extensions.(maybe help)

Fedora 24

Thanks a lot