View Page and Block. Using exposed filter from Page to change the block.

I have a view that creates a Page which is a table of locations that the user has set a flag on using flags module. This view has an exposed filter for the taxonomy term associated with each node. There is also a block on this view that using location and gmap shows a map pointer on each location.

What I'm wanting is when the user changes the exposed filter, I want it to update the map. For example the default url is myitinerary when you change the filter it becomes myitinerary?tid=7 .

I'm assuming I need to setup an argument of sorts to read this from the url and display the map accordingly.

Any suggestions on this.