She made her acting debut in the 2009 Yash Raj Films production Rocket Singh: Salesman of the Year. Anupama Chopra said, “Gauhar was fashionable, ambitious and smart receptionist, she was sharply etched and memorable as Koena. in the film”. Namrata Joshi from Outlook Indiastated that “Leading the pack is Gauhar Khan as the feisty office secretary. Gauhar is the colorful character in the film who played too nice.”
Khan next appeared as outspoken and rebellious Samara Shroff in the action thriller Game (2011). NDTV said that “Gauhar as the loyal secretary Samara is nicely outfitted.”
Khan played the Chand Bibi, in the 2012 romantic drama Ishaqzaade, in which she also did two item numbers “Jhalla Walla” and “Chokra Jawaan”. Shomini Sen of Zee News stated that, “Gauhar as a kind-hearted prostitute Chand sizzles in two songs. It is pity that she is used so less in the film.” Mrigank Dhaniwala from Koimoi stated, “Gauhar, who plays courtesan Chand, does very well.”Taran Adarsh said, “Gauhar is lovely in a special role. Also, she dances very well in the two tracks.”
On 30 November 2014, Khan was slapped during the shooting of a singingreality show called India’s Raw Star by a member of the audience who admonished her for wearing a short dress. Police arrested 24-year-old Akil Malik for attacking the actress at show’s sudio in Mumbai. They quoted the man as telling Khan that “being a Muslim woman, she should not have worn such a short dress”. He was later produced in court on 1 December 2014.