In 2006, Channel 4 employed him to present his own television show, How to Look Good Naked, which lasted for seven series,[2] and Say Yes to the Dress Lancashire.

Wan stood out from his peers from a young age and endured bullying from other children due to the fact that he was mixed race, tall, overweight and gay.

Wan received a diploma from the college, then enrolled at the Central School of Speech and Drama and continued to study performing arts.

However, the other students had backgrounds very different from his and he felt that his weight was beginning to dictate his life, later saying: "[It affected] everything: my personality, how people reacted to me, what I wore, everything.

In his autobiography he includes a section from a calorie diary he kept at the time, revealing he survived for weeks on end on as little as fruit and honey.

In addition, he wrote his first book[11] to accompany the series, entitled How to Look Good Naked: Shop for Your Shape and Look Amazing!, that was published in April 2007.

[6] Wan presented a documentary which was first broadcast on 27 January 2009, entitled Too Fat Too Young, which examined overweight children in the UK.

[13] In 2011, he presented a series entitled Gok's Clothes Roadshow on Channel 4, which was criticised for its gimmicks and similarities to Wan's previous shows.

[17] In 2012, he starred in a new series entitled Gok's Teens: The Naked Truth on Channel 4 where he gave advice to teenagers about self-confidence, bullying, anxiety and eating disorders.

As part of his role, he presented an Australian TV show titled Target Style the Nation, in which he transformed the appearances of five women.

[21] Wan's employer dismissed concerns about his use of the term "bangers" as a description for women's breasts in the brand's adverts.

Since August 2016, Wan has presented Gok's Fill Your House for Free for Channel 4 daytime, replacing Kirstie Allsopp.

[37] In 2018, Wan, along with co-founders Lucy Mitchell and Sarah Lewis, founded and launched the inaugural Golden Chopsticks Awards.

[41] Wan also filmed a brand new series of How to Look Good Naked, ten years after the last show aired on Channel 4.

Wan wrote a book titled How to Dress: Your Complete Style Guide for Every Occasion which was released by HarperCollins on 1 October 2008.

[56] In May 2018, Wan took a job in the animated preschool series Luo Bao Bei, voicing the father and uncle of the main character.

The show follows Luo Bao Bei, a bright and spirited seven-year-old girl with a vivid imagination, on a quest to understand the world around her.

[57][58] In 2021, Gok played the role of The Man in the Mirror in Snow White & The Seven Dwarfs at Woking New Victoria Theatre.

[63] In September 2020, Wan released his debut single, a cover of the Baby D song Let Me Be Your Fantasy, with DJ/producer Craig Knight featuring Kele Le Roc on vocals.

[70] In October 2024, it was announced that Wan would be Harriet Scott's new co-presenter on the Magic Radio weekday breakfast show from January 2025.

[6] Wan has been involved in various charitable projects, supporting anti-bullying charities Kidscape and Ditch the Label and launching a National Glasses Day with Specsavers to encourage everyone to wear their spectacles with pride.

[77] He is also a supporter and ambassador to Stonewall,[78] and The King's Trust, and is an active member of the Chinese community in London and the UK.

[81] He was appointed Member of the Order of the British Empire (MBE) in the 2020 New Year Honours for services to fashion and social awareness.