This framework supports a wide variety of model-based GUI testing techniques. The innovation lies in the architecture of GUITAR, which uses plug-ins to support flexibility and extensibility. Software developers and quality assurance engineers may use this architecture to create new toolchains, new workflows based on the toolchains, and plug in a variety of measurement tools to conduct GUI testing.
More detail is presented in this publication:
GUITAR: An Innovative Tool for Automated Testing of GUI-driven Software. Bao N. Nguyen, Bryan Robbins, Ishan Banerjee, and Atif Memon. Automated Software Engineering Journal. p.21, 1. 2014
I am a full time employee at VMware. GUITAR has been successfully used at VMware for testing Java based applications. GUITAR was used for reverse engineering the applications, modelling it as a graph and generating test cases which were replayed on the applications. The entire process was fully automated and integrates well with the existing infrastructure.