How Can I Help My Mother Obtain Her Green Card If My Aunt Adopted Me?

I was adopted by my aunt and I got my green card. My real mother wants to come live here, can I petition for her green card?
When your Aunt adopted you, she became your "legal" mother and totally responsible for you and your well-being. Under current immigration law, you may not file for your biological mother; she lost that legal right at the adoption. If your Aunt or Uncle is a US Citizen, (s)he could file for your biological mother in the category "brother or sister of a citizen."