Dick, According to the generally accepted meaning of the term, a picture of a street is not "street photography," nor is a picture of a building or buildings along a street.
Have fun with your new camera. I'm still enjoying my hybrid E-P1 with its 25mm (50mm equivalent) f/2.8 lens and 50mm Leica brightline finder, but it's not much use in the dark. Not too much noise up to ISO 1600, depending on shutter speed, but that's its noise limit. It's quite a good street camera in the daylight. The GF2 ought to give you at least as good results and the faster lens ought to help.