"Ggum" is the debut solo single by South Korean singer Yeonjun of Tomorrow X Together. It was released digitally by Big Hit Music on September 19, 2024, followed by a physical release on October 29, 2024.
On September 6, 2024, it was reported that Yeonjun would be making his solo debut that same month. Three days later, Big Hit announced Yeonjun's debut single "Ggum". Concept photos for the single were released on September 11 and 12. On September 13, Yeonjun released a video through the band's social media pages, teasing the song's choreography. A teaser for the single's music video was released a day prior to its release on September 18.
"Ggum" was released digitally on September 19, 2024. It was later released physically on October 29.
Carmen Chin from NME rated the song three out of five stars, describing it as having a catchy hook but with "little to write home about beyond that", and criticised the song's heavy use of voice modulation which "ends up drowning out Yeonjun's own uniqueness".
On South Korean music programs, "Ggum" achieved a first place win on the October 3 episode of M Countdown. The song also won the iHeartRadio Music Award for Favorite K-Pop Dance Challenge.
On the day of its physical release, "Ggum" topped the Circle Daily Retail Album Chart in South Korea, and the Oricon Daily Singles Chart in Japan, having sold 8,368 copies.