Asterisk 11 googlevoice dial plan

I just upgraded to asterisk 11 and configured google voice and I am able to place and receive calls.
With older asterisk version gtalk.conf had option for naming incoming line so it can be matched with dial plan. the examples I had seen only tell you to use s to do unmatched.
I attempted to add stuff to motif.conf but it did not like options added to it. Does anyone knows what options I need to add to match Google voice incoming calls to dial plan in extensions.comnf