Hi Suresh,
What is your planning strategy? Are you using MTO planning strategy like 20 or 25?
This indicator GR Non-Valuated will come when the account assignment is Sales order. This indicator set from requirement class OVZG valuation of special stock. Please set the field KZBWS='M' for the requirement class that you have used.
Please refer OSS note 459734 - How does the order account assignment work?
Regards,
R.Brahmankar