The online user guide and help files for GDCT are available in Adobe Portable Document Format (PDF). All of the GDCT documentation, including the user guide, may be distributed under the GNU Free Documentation License, Version 1.1. To view the GNU webpage visit http://www.gnu.org.

• Contents
• Introduction
• Categories
• Graphical Display of Categories
• Category Tools
• Functors
• Settings
• Appendices
• Complete User Guide