The Ghosts, who were in hat 1, will be up against the Serbian clubs of Partizan Belgrade, Estonian Flora Tallinn and Cypriot Anarthosis Famagusta.
The Gantois joined the group stage thanks to their victory in the play-off at the expense of the Poles of Rakow Czestochowa (0-1, 3-0).
The six days of the group stage will be played between September 16 and December 9. The winners of each group will advance to the round of 16, while the runners-up will advance to the knockout play-offs with the third-placed Europa League teams. The teams classified third and fourth will be eliminated.
The play-offs are scheduled for February 17 and 24, the round of 16 March 10 and 17, the quarterfinals March 7 and 14, the semi-finals April 28 and May 5.
The final is scheduled for Wednesday May 25 in Tirana, Albania.
