gcalevents not functioning

Hey guys, I am having a tough time getting gcalevents to work, at all. I really want to integrate it with gmap jquery plugin (not the extra). I think I don't understand the settings properly. I want to fetch the events from one specific public calendar, but the following snippet call doesn't work:

[[!gcalAgendaView &userID=`myemail%40gmail.com` &cached=`1` &limit=`200`]]

My account has multiple calendars, how would one differentiate them so only one is retrieved? I'm not using the system settings, just what is in the snippet call itself.

The documentation is basically non existant and my eyes cross when looking at the php. This would be a great addition to my site if I can get it working. I could really use a few pointers, thanks!

BRM