We present a graphical language SGCCS as a language for modeling of discrete real-time systems. SGCCS can be viewed as a graphical version of the synchronous Calculus of Communicating Systems (SCCS). A specification in SGCCS contains both graphical and visual components. We give an overview of basic concepts of SGCCS giving an example of specification in SGCCS. Further, we show briefly how the formal semantics of SGCCS is developed.