Hi,
Gruhle was a medical student before the war and was with the Ski battalion basically from day one, did the whole Vogesen thing, then Tirol, then in December 1915 during the advance in Serbia he had stomache sickness and feet (I assume frostbite?) . By January 1916 he was in Münich and spent the rest of the war working in Hospitals becoming a Feldhilsarzt.
Of course I would have liked Verdun in there somewhere,. but the veeery early stuff is nice as well ;-)
Will look up the officer today when I get a moment.. need to find the card