Ginetta announced the G60-LT-P1 project on 4 January 2017, targeting the non-hybrid LMP1 regulations that the FIA had introduced to widen the privateer entry pool. The car was designed by Adrian Reynard and Paolo Catone. Initial aerodynamic development used Computational Fluid Dynamics analysis, supplemented by 50-percent scale wind tunnel runs at the Williams Advanced Engineering facility beginning in June 2017. A planned first test in September 2017 was delayed; the car's first straight-line run took place at Leeds East Airport on 19 January 2018. Further testing followed at Snetterton Circuit and Motorland Aragon before the Le Mans debut.
The initial engine was the Mecachrome V634P1 unit. Following the debut, Ginetta parted ways with Mecachrome after the French engine supplier declined to increase the power output, which had left the car underpowered in its first race. Ginetta contracted AER to supply the P60B engine as a replacement, which was successfully test-fired on the chassis in early August 2018. The AER unit was subsequently upgraded to the P60C specification ahead of the 2019–20 FIA World Endurance Championship season.
The G60-LT-P1 was scheduled to debut at the opening round of the 2018–19 WEC season, the 6 Hours of Spa-Francorchamps, under the CEFC TRSM Racing banner operated in collaboration with Manor Endurance Racing. However, Ginetta withheld the cars from running during practice and qualifying after the team fell behind on payments. The cars therefore made their competition debut directly at the 2018 24 Hours of Le Mans.
Performance at the pre-race test day was limited, with both cars lacking low-drag trim; they qualified last in the LMP1 class, with the number-five entry falling behind four LMP2 cars. During the race, the number-six car retired after nine hours. The number-five car finished but received post-race time penalties for drive-time violations, relegating it to last among classified LMP1 finishers.
With the switch to AER power and new operators, Ginetta lodged two entries for the 2019–20 WEC season under Team LNT. Testing at the WEC Prologue at the Circuit de Barcelona-Catalunya drew positive feedback from a roster of experienced drivers including Stéphane Sarrazin and Egor Orudzhev. At the season-opening 4 Hours of Silverstone, the number-five car finished fourth, which translated to a recognised third-place result in the championship standings after the leading Rebellion R13 was ineligible to score points as a race-by-race entrant. The number-six car suffered a troubled race, losing a rear wheel early and later colliding with an AF Corse Ferrari 488 GTE.
Results improved across subsequent rounds in Japan and China, though mechanical fragility and the performance gap to the factory Toyota TS050 Hybrids remained a constant challenge. Both cars were withdrawn from the 2020 Lone Star Le Mans at Circuit of the Americas following a maintenance backlog after the Bahrain round and logistical difficulties created by the cancellation of an earlier Brazil event.
The coronavirus pandemic's financial impact on Ginetta's wider business accelerated the winding down of the LMP1 effort. The team withdrew both cars from the 2020 6 Hours of Spa-Francorchamps and on 21 July 2020 announced the factory Team LNT programme would not continue. Ginetta trimmed its entry at the 2020 24 Hours of Le Mans to a single car. Plans to race the G60-LT-P1 in the 2021 season were abandoned, ending the programme.
The G60-LT-P1 was notable as one of a small number of non-hybrid LMP1 privateers that kept a multi-marque top class alive during the years of Toyota factory dominance. The car's troubled gestation — payment disputes, an underpowered debut engine, and the mid-cycle switch to AER power — illustrated the financial and technical pressures facing constructors attempting to compete at LMP1 level without factory backing. Ginetta's experience with the programme informed the broader industry discussion about the transition to the Le Mans Hypercar regulations.