Sample GIA application making REST GMS Service calls?

Hello, does anyone have a working example of a GIA application that would illustrate the following:

1. Using interceptor block to all a defined iHub process.

2. the iHub process essentially submits a callback via GMS API

3. passing the callback number as a parameter in the interceptor block

The documentation from Genesys is terrible for GIA so I’m hoping someone’s done some hacking of this before.

eugene