The Collaborative International Dictionary of English v.0.48:

Gise \Gise\ (j[imac]z), v. t. [See Agist.]
   To feed or pasture. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gise \Gise\ (g[imac]z), n.
   Guise; manner. [Obs.] --Chaucer.
   [1913 Webster]