I searched for her in thepeerage that appears to list descendants and ancestors, but not her. There are Chappuis Konigs in thepeerage, but none point to Gerda.
From The Athenaeum; this image has been substantially cropped.
Baroness von Chappuis wears a dress with a criss-cross bodice and waist band, but without either blouson or overhanging waistline in this 1910 Lavery portrait.
Keywords: 1910, Lavery, Gerda von Chappuis, Chappuis family, Konig family, straight coiffure, modesty piece, trapezoidal neckline, criss-cross bodice, vee neckline, long close sleeves, waist band, close skirt, coat. necklace, earrings