Hi Manish,
No need to call any GUI class in web dynpro abap , Kindly find the following links:
http://scn.sap.com/thread/1787951
ADOBE INTERACTIVE FORMS in Web dynpro ABAP
Working with Dynamic Tables in Interactive Adobe Forms and Web Dynpro ABAP
**************** - Demo scenario on Adobe Interactive Forms using ABAP WebDynpro
- Gowtham