Well I figured out how to do it. Even so, I think GS needs to do some work on the dial plan interperter in their firmware. It is not up to the level of the PAP2. They also badly need more detailed documentation.
Here is my dial plan that supports 7, 10, and 11 digit dialing. It also blocks 1900 and has pre-defined numbers for 411 and 911. It permits international calling. Replace the 911 number with your local 911 direct dial number. Replace the 251 with your own area code.
The + at the end is the key…apparently. The documentation in the manual isn’t very good but this is working for me. I have the 063 firmware installed.