To design a GUI that is accessible to users with disabilities, follow these guidelines:

1. Clear and simple language: Use easy-to-understand text and avoid jargon.

2. High contrast colors: Ensure sufficient color contrast between text and background.

3. Font size and style: Offer adjustable font sizes and clear, readable fonts.

4. Screen reader compatibility: Design for screen reader accessibility.

5. Keyboard navigation: Allow users to navigate the GUI using a keyboard.

6. Closed captions and subtitles: Provide closed captions and subtitles for audio and video content.

7. Consistent navigation: Establish consistent navigation patterns throughout the GUI.

8. Descriptive icons and graphics: Use alternative text for icons and graphics.

9. Colorblind mode: Offer a colorblind mode or high contrast theme.

10. User testing: Conduct usability testing with users with disabilities.

11. Accessibility standards: Adhere to accessibility standards like WCAG 2.1 and Section 508.

12. Flexibility and customization: Allow users to customize the GUI to suit their needs.

13. Clear focus indicators: Use clear focus indicators for keyboard navigation.

14. Audio descriptions: Provide audio descriptions for visually impaired users.

15. Regular updates: Regularly update the GUI to ensure ongoing accessibility.

By incorporating these guidelines, you can create a GUI that is accessible and usable for users with disabilities, ensuring an inclusive and equitable experience.