Grid is a module which creates just a placeholder for other modules.
Then you can use any module (custom_html for example) to create any content inside of the grid.
If you check module named:
G+ Icon
placed in grid1 position, you will see this custom html code:
- Code: Select all
<a class="gkIcon gkColorGplus" href="#"><i class="icon-google-plus"></i></a>
It uses FontAwesome to generate the icon. Also, please disable tinyMCE editor in general configuration while you edit modules (change it to Editor - none).