To design a GUI that supports both event organizers and attendees, consider the following:

Event Organizer View:

- Easy-to-use event creation and management tools

- Customizable event pages and registration forms

- Real-time registration and ticketing tracking

- Integrated marketing and promotion tools

- Attendee management and communication features

- Reporting and analytics for event performance

Attendee View:

- Clear and concise event information and schedules

- Easy registration and ticketing process

- Personalized event recommendations

- Interactive event maps and logistics information

- Social sharing and networking features

- Mobile optimization for on-the-go access

Shared Features:

- User-friendly navigation and search functionality

- Consistent branding and visual identity

- Responsive design for various devices and screen sizes

- Secure payment processing and data management

- Real-time updates and notifications

By designing a GUI that caters to the needs of both event organizers and attendees, you can create a seamless and engaging experience for all users, ultimately leading to successful events and satisfied participants.