Genesis includes column classes to divide content into multiple columns of 2, 3 or more. You can read more about this here:
http://my.studiopress.com/docs/content-column-classes/.
To see an example of these can be used within Pages see this page on our theme demo:
http://hello.personalbranding.thebrandid.com/columns/
There’s also a plugin that you may find useful:
https://wordpress.org/plugins/genesis-columns-advanced/