setup gui for amazon ec2 ubuntu

I know this question has been answered, but I haven't got a concrete solution yet. I wish to follow through links here for the setup.

Link1 I tried this link and had setup according to all the steps. But when it comes to the client, how am I supposed to connect?

here's the image of the client I am using.

my amazon instance is with public dns ec2-.compute.xxx.xxx How can I connect to the instance now, through gui, after the steps I have followed from the link? Your help is much appreciated.