Gerd Grimm worked obsessively: In his Freiburg studio he drew continuously, usually ten hours a day. In order to stay "fit" and keep his dash, he often kept the television on during his commissioned work for the Reval brand. He preferred to watch political discussions or cultural programmes. On hundreds of pages he portrayed the discussion participants, so that between 1975 and 1995 there was hardly any German politician or writer whose portrait he would not have thrown on paper with a few strokes.

Many of these portrait sketches have been lost, because Grimm did not give them any meaning and again and again sent whole shots of them into the fire to light his tiled stove. What was left over from his sketches can rightly be called caricature, because it works out and hits on the significant character traits of the respective person precisely and always in a slightly ironic refraction.