How does knight Gawain distinguish himself in the opening scenes?

In the opening scenes of "Sir Gawain and the Green Knight," Gawain distinguishes himself through his bravery and chivalric values. When the Green Knight challenges King Arthur's court, Gawain steps forward to accept the challenge, demonstrating his willingness to protect his king and uphold the honor of the Round Table. His actions reflect his commitment to knightly ideals, showcasing his courage and sense of duty. Additionally, Gawain's humility is evident as he emphasizes his status as the least among the knights when he takes on the daunting challenge.