Documentation

To users

GrandCMS manual 

To developers

If you don't know OpenCart, then these links could help you to know GrandCMS, what is using the OpenCart core system and logic.

OCMOD Modification-System Don't forget! The ocmod xml need a code tag since oc 2.0.1 (<code>xxxsomething</code>)

vQmod

Developer-guide

opencarthelp.com

What is MVC?

What Are Modules?

More Module Development

PDF document about Module system