The Collaborative International Dictionary of English v.0.48:

Gige \Gige\ (g[i^]j or g[=e]j), Guige \Guige\, n. [OF. guide,
   guiche.] (Anc. Armor)
   The leather strap by which the shield of a knight was slung
   across the shoulder, or across the neck and shoulder.
   --Meyrick (Ancient Armor).
   [1913 Webster]