Global Quality Management System (G-QMS) in System of Systems (SoS) is a pioneering field of research essential for SoS G-organizations, which are characterized by their vast and complex technological systems and multi-organizational structures. Consequently, presenting significant challenges in implementing effective QMS for their operations. This manuscript completes the development of a novel conceptual model for G-QMSs in Sectors of SoS, drawing from extensive field research conducted within real SoS G-organizations employing the Grounded Theory methodology. This proposed model encompasses two foundational supra-entities, with this manuscript primarily dedicated to the second supra-entity, named “G-QMS in SoS”, which essentially represents Quality Management for SoS projects. The G-QMS in SoS model image is conceived through a description of its structural principles, entities architecture and interrelationships, alongside its complementary elements. Furthermore, the interrelationships between the two segment models that constitute G-QMS in Sectors of SoS are elucidated, offering a comprehensive view of the overarching model. Establishing a model for G-QMS in Sectors of SoS that describes the various structures of SoS projects and the G-organizations realizing them, as well as understanding the recommended G-QMS model, is vital as it directly impacts the success level of SoS projects and the effectiveness of the tailored G-QMS in these organizations.