Add GacUI in GUI.

Author: chaomai

README.md

@@ -275,6 +275,7 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 * [PDCurses](http://pdcurses.sourceforge.net/) - Public domain curses library with both source code and pre-compiled library available. [PublicDomain]
 * [Sciter](http://sciter.com/) - Sciter is an embeddable HTML/CSS/scripting engine aimed to be used as an UI layer of modern desktop applications. [Free/Commercial]
 * [wxWidgets](http://wxwidgets.org/) - A C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base. [Own LGPL]
+* [GacUI](https://github.com/vczh-libraries) - GPU Accelerated C++ User Interface, with WYSIWYG developing tools, XML supports, built-in data binding and MVVM features.
 
 ## Graphics