The predecessor of Gmarket was founded in 1999 by Young Bae Ku. At the time, it was part of the online auction company Interpark.^[5][6] In 2000, it spun off as its own website, known as Goodsdaq. In 2003, the website was renamed Gmarket and adopted a customer to customer e-commerce business model.^[7]

In 2006, Gmarket became the first South Korean online company to be listed on the NASDAQ.^[8] That same year, it launched its global website with product listings in English.^[9]

In 2009, eBay acquired Gmarket for approximately 1.2 billion USD after buying Gmarket shares from Interpark and Yahoo. Following the acquisition, Gmarket was delisted from the NASDAQ.^[3]

After the acquisition, G-Market received an on-site investigation by the Fair Trade Commission for allegations of unfair trade due to 11street's report of abuse of market dominant status, and was charged with a corrective order and fine from the Fair Trade Commission as well as being charged with prosecution.^[10]

However, the following year, the 6th Division of the Seoul Central District Prosecutor's Office concluded that the case was not suspicious. An official at the prosecution said, "The number of sellers who actually stopped trading with '11street' was so small that the effect of restricting competition was not reached, and it was acknowledged that the eBay Market side performed its usual management and supervision duties to prevent unfair trade, so it was disposed of without charge."^[11]

Collectibles, appliances, computers, furniture, equipment, vehicles, and other miscellaneous items can be listed, bought and sold on the website.

Gmarket is also an easy place for unscrupulous sellers to market counterfeit and credit merchandise, which can be difficult for novice buyers to distinguish without careful study of the auction description.

Gmarket generates revenue from sellers, who pay a fee based on the selling price of each item and a fee based on the starting price, and from advertising. In 2005 it was announced that Gmarket would increase fees it charges to Gmarket Store sellers, which caused considerable enough controversy. The president of Gmarket then emailed all Gmarket users with news that other fees would be decreased. Gmarket does not handle the goods, nor does it transact the buyer-seller payments, except through its subsidiary shopping mall credit. Instead, much like newspaper want-ads, sellers rely on the buyers' good faith to make payment, and buyers rely on the sellers' good faith to actually deliver the goods intact. To encourage fidelity, Gmarket maintains, rates, and publicly displays the post-transaction feedback from all users, whether they buy or sell. The buyer is encouraged to examine the sellers' feedback profile before bidding to rate their trustworthiness. Sellers with high ratings generally have more bids and garner higher bids. However, it is possible for sellers to make their feedback private and just leave the numbered rating (number of positive, negative, and neutral feedback with a positive feedback percentage), which means that bidders and sellers cannot see the comments other users have left. Gmarket also has a significant affiliate program, and affiliates can place live Gmarket Shopping product images and links on their web sites.

• Gmarket (in Korean)
• Global Gmarket (in English)