Hi Melissa,
Do you want to connect to George as your great grandfather?
First thing you need to do is become a member of WikiTree, as I see you are just a Guest now.
When you become a member you can begin adding your parents and grandparents and then when you get to your great grandfather you will find that he is already here (which you know) and you can link your family to him.
Sounds confusing? Really when you start it will all become clear.
https://www.wikitree.com/wiki/How_to_use_WikiTree
Come back to G2G if you have more questions.