Padding to objects in GoPalette

I have nine Goshapes added to my GoPalette. Now I would like to arrange them in two rows with uniform padding so that the GoPalette studio looks perfect. I am able to arrange them to two rows. But the spacing between the shapes causes them to split to more than two rows if I interchange the object positions.
Please provide me a solution to sort this out.
Thank you

What values do you have for the GoView.GridCellSizeWidth and GoView.GridCellSizeHeight?

Look at the strategy that DrawDemo uses.