I don't have a GS, but my other half has an '85 GS700E. In support of working on that bike, I scanned the factory owner's manual to PDF and gave it an index. Since there are probably at least three other people that still have a GS700, I thought it might be useful, so here ya go.
1985 GS700E/ES owner's manual (27 MB)
Note that the PDF above is formatted for A4 paper, since the original manual appears to be A4 sheets stapled in the middle. Most people in the US will need to use the "scale to fit" option in their PDF software when printing it on 8.5x11 paper. (A4 is the standard "office paper" size outside of the US; it's 8.27" x 11.69", instead of 8.5" x 11".)
Please feel free to grab a copy for your own use. I don't own the copyright on the original manual; that belongs to Suzuki.
Yes, I know BikeCliff already has a scan of this manual on his site! However, in that scan, some of the pages are cut off on one edge or the other.
Details: I scanned this at 600 dpi from an original paper copy of the 1985 GS700E/ES owner's manual and went to work.
The PDF index may not show up if you're reading the PDF inside your Web browser. Save the PDF and open it with your favorite PDF reader (Acrobat Reader, Foxit, Evince, etc) and the index should show up.
I hope this helps!
Eule