I have been using CA PPM from a long time but never went in programming like GEL scripting. Can someone provide information on how to test GEL scripts. Maybe it would be good to provide an example which can be followed step by step. Please provide some example.
You can refer CA's Gel scripting documents, try below links:
CA PPM SaaS - 15.1 : GEL Basics
XML Open Gateway Developer Guide Release 13.2.00
You can use process or XOG Client for testing you gel, after going through CA's Gel guides.
Let me know if you get stuck somewhere while learning basics in Gel
There are some old CA guides in the GEL.zip file attached to the old FAQ thread I used to maintain ( CA Clarity General Discussion - FAQs ) - I think that this is a link to the zip file directly ; https://communities.ca.com/servlet/JiveServlet/download/2297606-1-48932/Gel.zip
Also this tool might be useful (not provided by CA, but by the very clever ChrisW) GelScripting.com