Map by default problem with GMap

Hello everybody,
I defined with the module Gmap (admin/settings/gmap) a map by default then I defined "build a view" (admin/build/views) and this action displays my map perfectly.
I just would like to display a second map of a different city but every time I create a new map (element GMap View) it displays the same map, the one by default.
Here is my question : how can I display two different maps e.g one of Paris and one of London?
If you don't understand I can give you further details
Thank you