The Groumall was a freighter that was in service with the Cardassian military in the late 24th century. Gul Dukat was assigned command of the Groumall after he was demoted for bringing his illegitimate daughter Tora Ziyal back to Cardassia Prime. Damar also served on board at the rank of glinn.
The Groumall transported Major Kira Nerys to Korma in 2372. It was confronted by a Klingon Bird-of-Prey commanded by K'Temang, but the Klingons declined to attack such a helpless vessel. After the encounter, Dukat and Kira mounted a system-5 disruptor from Korma inside the Groumall's cargo bay and followed K'Temang to Loval. The disruptor fired effectively on the Bird-of-Prey, but the freighter was itself severely damaged when the Klingons returned fire. Kira managed to switch the crews of the two ships via transporter, and Dukat then used the Bird-of-Prey's weapons to destroy the Groumall with the Klingons aboard. (DS9: "Return to Grace")