It appears that this G.S. Waray (वारे in Marathi) is a relative of the Annashastri Waray alias Shridhar Shastri Waray of Nasik, a well known Shukla Yajurvedin Shastri, who had a sizable collection of Sanskrit manuscripts that included a manuscript of the Maitrāyaṇī Prātiśākhya.  I was interested in this manuscript, and spent several days in Nasik, but the manuscript collection was locked up in an inheritance battle among the descendants of Annashastri Waray and no one had access to it.  The Late T.N. Dharmadhikari of Pune also tried to get access to this manuscript collection, with no success.  The Nasik Nagar Vachanalaya has a sizable collection of Sanskrit manuscripts donated by the local priestly family, but at least at the time I went there and checked it, it did not include the Waray collection.  I don't know what happened to the Pune branch of the family.  Perhaps someone like Mr. Manjul from Pune may have some information regarding this.