Greenville Triumph SC

The formation of USL D3 was first announced in April 2017, and league officials began touring the country, looking for candidate cities for new soccer clubs. USL D3 vice president Steven Short visited Greenville in July 2017 and told local reporters at the time that Greenville was one of the league's top candidates. In January 2018, the league began announcing teams that would play in their 2019 inaugural season. The formation of a USL D3 club in Greenville was officially announced on March 13, 2018, with local entrepreneur Joe Erwin named the principal owner. The Greenville team was the third team to join the league after Tormenta FC and FC Tucson, two clubs which already existed and played in the Premier Development League. The team qualified for the playoffs in their first year of existence.

The team's name, Greenville Triumph SC, and its logo and colors were announced on August 9, 2018. On August 27, the team announced that the team would be coached by former U.S. national team player John Harkes, who had previously served as head coach of USL club FC Cincinnati for the 2016 season. Harkes was signed on a three-year contract.

On June 8, 2021, GTSC announced they will field a women's side to compete in the new USL W League beginning in 2022.

On January 28, 2022, GTSC officials announced that after a two-year search for a new stadium location, they had settled on a six-acre site in Mauldin, South Carolina at BridgeWay Station. The proposed stadium would contain 8,100 seats and be multi-sport. Had county officials approved the stadium, the project would have been completed by the beginning of the 2023 season. The Greenville County Council finance committee rejected that original proposal.

On October 30, 2024, after a two-year delay, the team announced that plans for a 10,000-seat stadium (expanded from the prior 8,100-seat plan) in Mauldin at BridgeWay Station would move forward. The multi-use venue will be home to both the Triumph and the Greenville Liberty. It is expected to be completed in 2026 with an estimated cost of $80-$100 million.

On September 23, 2025, the team put up an article on their official team website with an update (after more than a year since the last announcement) that highlighted that "(T)he multi-use stadium within BridgeWay Station in Mauldin will host its first matches in 2026." and that they would receive money, in different amounts, from the city of Mauldin, the state of South Carolina, and Greenville Pro Soccer, "along with millions of donated land and in-kind planning, development, and coordination contributions from Hughes Investments, developer of BridgeWay Station." One important thing of note was that, compared to the 10,000 figure initially put out, the stadium would only have up to 6,300 people, "creating a more intimate experience for the fans", and that lastly, "the design will mirror BridgeWay Station’s distinctive European-inspired architecture, featuring grand columns, ornamental cornices, Italian-inspired towers, and expansive archways that will serve as grand entrances into the stadium and complement the development’s walkable, community-centered design."