Lead Developer
You’ll want to give your menu items custom classes and add CSS for those classes: https://generatepress.com/knowledgebase/menu-social-icons/
You can use float: left or float: right, but there’s no option for centering only specific items.
Documentation: http://docs.generatepress.com/
Adding CSS: http://docs.generatepress.com/article/adding-css/
Ongoing Development: https://generatepress.com/ongoing-development