Your Guide to Using the Horizon Template for Joomla
No, Horizon is only compatible with Joomla 3.4+.
Gantry is, as a basic definition, a framework used for assembling, building and maintaining a RocketTheme template. It is an advanced platform for dramatically extending the capabilities of the entire theming system of Joomla.
No. RocketLauncher will install both Joomla and the demo sample content and images, so you will need a fresh Joomla! installation.
To avoid image license copyright issues, all sample content images shown in our demo site will be replaced with blank versions in the RocketLauncher version.