After some experimentation, I seem to have devised a working setup for both TomTom 6 and Anywhere Map to share the output from the internal GPS.
In the GPS CP, Anywhere Map recommended that both the program port and hardware port be set to NONE, and the access tab checkbox for Magnage GPS Automatically be unchecked. This will not work.
The following settings will work. The Program port should be set to Com7, and the Hardware port set to Com1. The Manage GPS automatically checkbox should be checked to enable. (I'm not sure why this needs to be done since GPSGate is redirecting the GPS output, but nevermind for now...)
Then in GPS Gate, configure the Input to Com7, 9600 baud, and create a virtual commport for the output. I created Virtual Com2, then in the Anywhere Map setting, I configured the GPS communications port to Franson COM2.
Both the TomTom6 Navigator, and Anywhere Map can use the data from the internal GPS.
Next, I am going to stress out the rx5915 by running a third GPS program, Maptech Pocket Navigator to see if I can get all 3 running simultaneously....