If you are creating the widget area by Genesis Widgets Generator plugin then you will choose “genesis_before_footer” from Hooks drop down list and enter 5 in priority input box. Genesis Widgets Generator plugin is not adding any extra CSS for front end design. Deign is varying from site to site. SO you will add custom CSS code in your style.css file for better fit.
You can create one widget area. Then drag&drop the text widget there and will use the columns class method (like one-fourth ).