Got it.
var gridster = $(".gridster ul").gridster().data('gridster');
$(function(){ //DOM Ready
$(".gridster ul").gridster({
widget_margins: [10, 10],
widget_base_dimensions: [140, 140],
serialize_params: function($w, wgd) {
return {
id: $w.attr('id'),
col: wgd.col,
row: wgd.row,
size_x: wgd.size_x,
size_y: wgd.size_y
};
}
})
var gridster = $(".gridster ul").gridster().data('gridster');
gridData = gridster.serialize();
alert(gridData.toSource())
});