I've attached two pictures of the most common GEC install in this area.
I believe the intersystem ground buss is what HotLine described earlier. I don't like the way it interrupts the conduit and eposes the wire. That's why I much prefer the way the Ideal fitting connects to the panel as well as the pipe. I'm not worried about the connections to the data/phone/etc. grounds being exposed; those wires are usually just stapled to the siding.
In a similar manner, the GEC is exposed at the connection to the ground rod. Again, I don't lie the way the conduit is left dangling. Had I been able to get the proper fitting, I would have run the pipe all the way to the rod. (At least the exposed wire will be buried and out of site).
