Hello, Less of a GUI, more of a "do it yourself" toolkit. You could write your own little GUI toolkit using OpenGL and use glfw, http://www.glfw.org/ https://github.com/glfw/glfw to provide a OpenGL context. I don't recommend this though if you need advanced controls and especially lots of different controls, writing a complete GUI is not an easy job, but if you only need limited controls with limited options, this might work for you. Also note, OpenGL can be a bitch, if you need your work done fast, this probably also not an option, OpenGL takes time to learn especially OpenGL 3.
Best regards, David
