Get the Haynes for torque values or the BMW cd rom for $$$ (cheaper bootlegged off eBay).
That's all there is so far as I know. The Haynes, while not particularly slick, gets the job done well enough if you only wanted one.
BMW R1200GS, R1200ST, R1200RT, R1200R, R1200S Repair Manual 2004-2009 | Haynes