When some people from Punjab, India say they write in Punjabi and I ask them if they write in Gurmukhi and they say, "no, I write in Punjabi". What exactly are they saying? I ask them if it was the same as Gurmukhi and they said no. They said the spelling is different. When I have seen the writing, it looks like Gurmukhi, but with (Hindi script/Devanagari) characteristics. However, it was definitely not Devanagari. It looks like some kind of "Punjabi shorthand" if you will. So if it is not Gurmukhi script, then what do you call the name of the script they are using to write Punjabi language?
I think Gurmukhi is for writing formal Punjabi (what I learned) and the Gurmukhi like script they use is for writing Punjabi shorthand.