getting query string params in template

["G.L. Grobe" <ga...@grobe.net>]

I'm sending back to the client browser a URL w/ a query string parameter that I'd like to capture in my template page ...

category/products.vm?select=A

So in my template page I'd like to select a #foreach loop depending upon the value of select.
I saw the "Using Velocity In Servlets" section in the dev docs, but didn't think I was looking in the right place.

Any help much appreciated.