"select" on a gridview navigates to a new page and new info

Question

I have a gridview of Customer names and I have enabled select. I want to be able to click select next to the customers name and it take me to a new page showing a gridview of the complete customer data (address, age, etc.) I have been told I need a query string, but I have never used one before. What is the best way to accomplish this?

Thanks!