RGG is a GUI generator for R scripts. RGG consists of an XML based GUI definition language and a Java based GUI engine. GUIs are generated in runtime from defined GUI tags that are embedded into the R script. User-GUI interaction is returned to the R code and replaces the XML-tags. RGG can be used with JGR (Java GUI for R) or as stand-alone software, and can be integrated to any software supporting R. The RGG project will further include the development of a web-based repository for R GUIs being developed by community.