Medieval romance is a genre of poetry that has certain ways a knight lives his life. One of the main characteristics is the knights Code of Chivalry. This code made knights act honorably, bravely, honestly, and courteously. Another main aspect of medieval romances is “courtly love.” Courtly love is when a knight adores a married women, and she shares the admiration as well. Marriage was no for love during that time, so it was common for married women and men to show affection to someone other than their spouse. Medieval romances also show supernatural people, animals, and events.
A romance hero usually adheres to a strict code of knightly conduct, which requires his absolute loyalty to his liege lord, extreme generosity, refusal to break his oaths, and the defense of the helpless. Another important element of medieval romance is its exploration of the rules of courtoisie, or courtly behavior. Sir Gawain, for example, is known for his excellence in courtoisie: he delights everyone with his conversational skills, and, most importantly, behaves with impeccable courtesy toward ladies.
Next, making use of magic is a common trait pf medieval romances, and the supernatural elements in Sir Gawain and the Green Knight are present from the very start. One of the examples is Morgan le Fay. The mastermind behind all the events that take place, she shows her magical abilities when it is revealed that she is responsible for enchanting Lady Bertilak/The Green Knight in the first place.
To sum up, the focus on the code of chivalry, the presence of courtly love and magical elements all make Sir Gawain and the Green Knight a bright example of medieval romance.