How to get applied graphic style name & symbol name from a document

Here's a short method for writing out the Graphic Stlyes contained in the document. If you want just the ones used try running the Delete Unused Panel Items action first.

#target illustrator

var textFile = File('~/Desktop/Graphic Styles.txt');

var doc = app.activeDocument;

var docText = '';

for (var i = 0; i < doc.graphicStyles.length; i++)
     {
          docText += doc.graphicStyles.name + '\r';
     }

textFile.open('e');

textFile.write(docText);

textFile.close();

_______________

And here's a look at the text file

You should be able to do the same with symbols.