Comment 18 for bug 1450180

> you need gtk 3.16 installed for this to happen.

my gparted uses gtk-2.
Do you mean that without gtk-3 on the system, gparted works?

Package: gparted
Version: 0.19.0-2
Depends:
libglib2.0-0 (>= 2.12.0),
libglibmm-2.4-1c2a (>= 2.42.0),
libgtk2.0-0 (>= 2.14.0),
libgtkmm-2.4-1c2a (>= 1:2.24.0),
...

http://packages.ubuntu.com/vivid/gparted