Did you ever find a mechanical drawing?
I too am looking for a dimensional drawing locating mounting screw holes and attachment locations.
I could not find a mechanical drawing just schematics in the list of document in Intel_Jesus answer, perhaps he misunderstood what a mechanical drawing is or just assumed it would be in the document location and never checked.
If it is there and I missed it can someone please provide a more accurate Link with out having to cull threw a myriad of files. I have both Gen 1 and Gen 2 boards.
Well, I could not find them also but i measured an Intel Galileo gen 2 and made the technical drawing (size, pins, connectors and screw holes) in solid works. Until now I have just shared the case that I designed (SDL for 3D Printer) for the board but if you want I can share the technical drawing also (I can only share them on Monday).