Hi,
Sorry for the delay but I do not always get notifications on new posts. I randomly check this forum every few days.
For the future you can post anything in GEO my WP’s forum where I am more responsive.
As for your question, it will not be a very simple task since I will need to build an admin part where admins will be able to enter more than a single option for redirection. It might be a nice idea for an add-on for the future.
However, in the new coming version of GEO my Wp ( which I have a beta ready ) I added a hook that fires right after the current location widget is being used. You can use the hook with a simple function that will check the value of the city and redirect the user to a page based on that.
Here you can read more and download the new version