$.fn.fullHeight = function(minheight) {
        var $this = $(this);
        var minH = minheight || 480;

        $this.outerHeight($window.height());
        $window.on('resize', $(this), function(event) {
            $this.outerHeight(Math.max($window.height(),minH));
            event.preventDefault();
        });
    };
    $('.gs-main-header-fullheight').fullHeight();