The integration of Generative AI (GenAI) into 6G networks marks a transformative step in communication systems. This report outlines three main categories: GenAI for 6G network, 6G supporting GenAI applications, and GenAI-based services as a native 6G feature. It highlights four essential requirements: network computing, data transmission, network functions, and network AI designs. Key research directions include developing AI-optimized communication protocols, advancing GenAI algorithms for network augmentation, building scalable distributed computing frameworks, and exploring native GenAI applications in 6G. Collaboration across industries and academia is crucial to achieve efficient and automated 6G networks.