To design a GUI that supports collaboration among multiple content creators, consider intuitive navigation and clear labels to help users find features and tools. Implement role-based access control to assign permissions and access levels for different user roles.

Real-time updates reflect changes made by collaborators instantly, while version control tracks changes, revisions, and authorship. Commenting and feedback tools enable users to leave comments, suggestions, and mentions.

Collaborative editing allows multiple users to edit content simultaneously, and content organization uses folders, tags, or categories to keep content structured. Robust search and filtering capabilities help users find specific content.

A notification system alerts users to updates, mentions, or changes, and user profiles and avatars display user information and avatars for personalization. Drag-and-drop functionality simplifies content uploading and arrangement.

A responsive design ensures the GUI adapts to various devices and screen sizes, and accessibility features like keyboard navigation and screen reader support are essential. Customization options allow users to personalize their experience, and interactive tutorials and guides facilitate onboarding.

By incorporating these features, you can create a GUI that supports effective collaboration among multiple content creators.