Is sir Gawain alive

Sir Gawain's wife was Ragnell who he married to save King Arthur from being killed by a giant.

One day King Arthur ran into a giant and the giant said he'd give Arthur a year and a day to find the answer to his riddle or else he'd die. Later an ugly hag came to the castle and promised to give Arthur the answer if she was allowed to marry his noblest knight. Sir Gawain agreed to save his uncle's life. Gawain kissed Ragnell and she transformed into a beautiful woman. She told he had to choose between her being beautiful during the day or beautiful at night. He told her he wouldn't choose for her and the curse was broken. She told him her brother, the giant from earlier had placed the curse upon her. Arthur is saved because Ragnell tells him the answer and everything ends happily. Hope I helped.