Hmmm. A larger sample might be helpful. It sort of has a DINEngschrift quality to it...but not quite. Someone may be able to identify it by the "M".

I used the Sans Serif Font ID Guide and found a sample that seems to meet the shapes of the M, G and S pretty well. It is FF City Street East Bold. (http://bowfinprintworks.com/SansIDPage03.html) shows East Regular, but you could check the FontFonts site to see a better sample with more letters.

That's my vote.