what kind of a work is it?
Middle English chivalric romance
Sir Gawain and the Green Knight
Sir Gawain and the Green Knight (Middle English: "Sir Gawayn and þe Grene Knyȝt") is a late 14th-century Middle English chivalric romance. 
why is the knight green in sir gawain UNANSWERABLE
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Sir Gawain and the Green Knight [SEP] Introduction
Sir Gawain and the Green Knight (Middle English: "Sir Gawayn and þe Grene Knyȝt") is a late 14th-century Middle English chivalric romance. It is one of the best known Arthurian stories, with its plot combining two types of folk motifs, the beheading game and the exchange of winnings. Written in stanzas of alliterative verse, each of which ends in a rhyming bob and wheel, it draws on Welsh, Irish and English stories, as well as the French chivalric tradition. It is an important example of a chivalric romance, which typically involves a hero who goes on a quest which tests his prowess.