The Gantry Framework operates at the template core, providing all the base features and functionality, such as the 960 Grid System, amongst many others.
Joomla.org is an invaluable resource for general instructions and information on how to use, configure and modify Joomla.
More extensive details of the Gantry Framework, inclusive of both written and video tutorials, please visit the dedicated Gantry Site.
This demo includes a series of RocketTheme Extensions, with template specific styling.
This site has a range of guides to introduce you to the basics of the template.
The template has valid code, based on the XHTML 1.0 Transitional standards.