Do I still need to obtain a copy of my Italian grandfathers birth certificate for jus sanguinis?

I received a swift reply regarding the birth of my grandfather. This was my second attempt. It seems that the IRC's seem to do the trick. Though I did not receive a copy of an original document I did receive the following.

http://www.thehitman.net/cover.jpg
http://www.thehitman.net/document.jpg ...

The response that I got is that it could, if she acquired a different citizenship as a result of her adoption.

When she was adopted I think it was with the assumption that my gf was a US Citizen. How ever my mother was and her siblings were wards of the state of california for a short time.

Thanks. It was an official State of California adoption. I sent the San Francisco Consulate an email about adoption.

Do I need to then contact USCIS about if a Certificate of Naturalization exists with a G-639 form?

Yes that is correct.

http://homepage.mac.com/dreiling/petition2.jpg

Does Intention and Petition = Naturalization? I am assuming that the document I need is the Certificate of Naturalization, but I unsure if I get that from NARA, the NY Courts or USCIS.

I am trying to attempt linkage to my grandfather who was born in ...