I'm trying to set this up with a gp338 but having issues. In your CPS, expand Call, then Quik-Call II Call, there should be a template already available, double click it, then click on the format tab. You should be able to pull down, in the Call Format menu, "Long Tone" and enter the freq for Tone A. You then have to assign it to a personality. Next go into your corresponding personality and under Signalling -> Rx choose Quik-Call II-1
This is what I'm doing and it's not working, although my logic doesn't seem very far off, so maybe you can play around and report back!