gxui v2.0 is the latest release of gxui Library. It is based on ExtJs 4.1 and provides the following set of controls:
After downloading the library, follow the installation instructions and check the documentation, and the change log.
RSS Reader KB hosted in public GXserver contains both a basic RSS Reader application built using some of the controls provided by gxui Library and many examples of each control that will help you to learn how to use them. The KB is available here.
After installing gxui Library, under the Samples directory, you will find a GeneXus export file named examples.xml with lots of examples.