How can I auto align desktop icons on right side?

Sometimes gconf-editor will reveal additional options. In this case, there's nothing relevant in the apps/nautilus section.

This issue was queried on launchpad a couple of years ago : https://answers.launchpad.net/ubuntu/+question/48705, but there was no bug filed subsequently.

Your only option is to manually align your icons.

Unfortunately there is no way to do this on GNOME. It has been requested in a bug report and on Ubuntu Brainstorm, but no traction has been made on it.

You would have to manually align the icons, or move your dock.

The only thing you can do to move icons on the right side of the deskop (Mac style) is to install screenlets and start "folderview" and set it to show the desktop folder, then you can adjust the screenlet on the right side of your desktop.