Gerudo Town is a location in The Legend of Zelda: Breath of the Wild.
Gerudo Town is deemed the largest trading hub in Hyrule. However, the town has a rule that prohibits men (or voe as the Gerudo call them) from coming into the town; only women are permitted to go in.
In order to get inside the town to meet with Riju, the Gerudo's chief, and her bodyguard Buliara, Link has to look for a man who was able to sneak in to the town by disguising himself as a vai (the Gerudo term for female) near the Kara Kara Bazaar, then purchase his Gerudo Veil, Top, and Sirwal garments for 600 rupees. Once inside, it is crucial that Link keep the disguise on; if he removes any part of it, he is immediately thrown out.
Entering Riju's palace, she is surprised to see that Link was able to get in. Buliara stops Link from coming any closer and insists that he explain why he is there. Riju notices Link's Sheikah Slate, and states that he appears to be more than a typical traveler. She asks Link for his name, and questions his claims that he can calm Divine Beast Vah Naboris. Riju then recalls her mother talking about a swordsman going by the name of Link who was put in a deep slumber by Princess Zelda when the Great Calamity occurred; Buliara adds that the swordsman in question also wielded a sacred sword known as the sword that seals the darkness, pointing out that their visitor doesn't have such a weapon. She then says that she doesn't believe that a Hylian female was one of the champions. It is then that Buliara finds out their guest is really a male. Riju says it's illegal for males to come into Gerudo Town, but is willing to make an exception, considering Link is a champion and a friend of Lady Urbosa, as long as he keeps his disguise on.
Riju explains the threat that Naboris is posing to their town, and that it's only a matter of time before it comes near the town, adding that if Link is a champion, then he will surely be able to enter Naboris and calm it down. Buliara proposes that Link first prove himself by retrieving Riju's Thunder Helm that the Yiga Clan took from her overnight.
After defeating Master Kohga and recovering the Thunder Helm from the Yiga Clan Hideout, then appeasing Naboris, Buliara and Riju reward Link with Urbosa's weapons in gratitude, offering replacements if either of them are broken or lost. He is still required to keep his true gender a secret while within their walls.