After filing for renewal and getting the receipt from USCIS you could get stamp on the passport. This helps in case of traveling and emergency.New GC could take from few months to a year also.
You can request the I-551 stamp when you go for fingerprinting.
EitherDo we request for I-551 stamp at the biometrics center or should it be done separately done by taking an Info pass at an info pass center?
Regards
Usadesi