Abstract : According to the paradigm of component-based software engineering a software system can be represented as a set of independent reusable modules which communicate with each other. The OASIS team is working on a Grid Component Model (GCM) which defines how a distributed component-based application should be designed, deployed and developed. This work is focused on the modeling aspect of GCM-based applications. First, we define a formal model for the GCM-based applications architecture. Second, we provide a formalized set of consistency constraints for the GCM-based architecture validation. The created set consists of the validation rules gathered from different sources. Finally, we implement a graphical editor for the GCM-based applications architecture and behavior specifications. It has an architecture validation module which allows to verify the formalized set of constraints.