| Liga | Tiempo(Mexico City) | Redondo | Equipos | Resultados | Puntaje |
| Friendlies Clubs | 06/28/22 11:30 | Club Friendlies 3 | Rebecq vs Union St. Gilloise | W | 1:3 |
| Friendlies Clubs | 07/02/22 06:00 | Club Friendlies 3 | Deinze vs Union St. Gilloise | W | 0:1 |
| Friendlies Clubs | 07/05/22 18:00 | Club Friendlies 3 | Union St. Gilloise vs Racing FC Union Luxembourg | D | 2:2 |
| Friendlies Clubs | 07/06/22 10:30 | Club Friendlies 3 | Union St. Gilloise vs Racing FC Union Luxembourg | D | 2:2 |
| Friendlies Clubs | 07/06/22 10:30 | Club Friendlies 5 | Racing FC Union Luxembourg vs Union St. Gilloise | D | 2:2 |
| Friendlies Clubs | 07/09/22 11:00 | Club Friendlies 3 | Brighton vs Union St. Gilloise | D | 0:0 |
| Friendlies Clubs | 07/13/22 12:00 | Club Friendlies 3 | Sporting CP vs Union St. Gilloise | D | 1:1 |
| Friendlies Clubs | 07/13/22 12:00 | Club Friendlies 3 | Sporting CP vs Union St. Gilloise | D | 1:1 |
| Friendlies Clubs | 07/16/22 06:00 | Club Friendlies 1 | Feyenoord vs Union St. Gilloise | W | 0:4 |
| Jupiler Pro League | 07/23/22 12:45 | Regular Season - 1 | St. Truiden vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 07/29/22 12:45 | Regular Season - 2 | Union St. Gilloise vs Charleroi | W | 1:0 |
| UEFA Champions League | 08/02/22 12:45 | 3rd Qualifying Round | Union St. Gilloise vs Rangers | W | 2:0 |
| Jupiler Pro League | 08/06/22 12:45 | Regular Season - 3 | KV Mechelen vs Union St. Gilloise | L | 3:0 |
| UEFA Champions League | 08/09/22 12:45 | 3rd Qualifying Round | Rangers vs Union St. Gilloise | L | 3:0 |
| Jupiler Pro League | 08/13/22 12:45 | Regular Season - 4 | Union St. Gilloise vs Kortrijk | W | 2:1 |
| Jupiler Pro League | 08/28/22 10:30 | Regular Season - 6 | Union St. Gilloise vs Anderlecht | W | 2:1 |
| Jupiler Pro League | 08/31/22 12:30 | Regular Season - 5 | Antwerp vs Union St. Gilloise | L | 4:2 |
| Jupiler Pro League | 09/04/22 13:00 | Regular Season - 7 | Zulte Waregem vs Union St. Gilloise | W | 1:3 |
| UEFA Europa League | 09/08/22 10:45 | Group Stage - 1 | Union Berlin vs Union St. Gilloise | W | 0:1 |
| Jupiler Pro League | 09/11/22 10:30 | Regular Season - 8 | Union St. Gilloise vs Genk | L | 1:2 |
| UEFA Europa League | 09/15/22 13:00 | Group Stage - 2 | Union St. Gilloise vs Malmo FF | W | 3:2 |
| Jupiler Pro League | 09/18/22 08:00 | Regular Season - 9 | AS Eupen vs Union St. Gilloise | W | 1:2 |
| Jupiler Pro League | 10/01/22 08:00 | Regular Season - 10 | OH Leuven vs Union St. Gilloise | W | 0:3 |
| UEFA Europa League | 10/06/22 13:00 | Group Stage - 3 | SC Braga vs Union St. Gilloise | W | 1:2 |
| Jupiler Pro League | 10/09/22 13:00 | Regular Season - 11 | Union St. Gilloise vs Cercle Brugge | W | 2:1 |
| UEFA Europa League | 10/13/22 10:45 | Group Stage - 4 | Union St. Gilloise vs SC Braga | D | 3:3 |
| Jupiler Pro League | 10/16/22 13:00 | Regular Season - 12 | Oostende vs Union St. Gilloise | W | 1:6 |
| Jupiler Pro League | 10/19/22 10:30 | Regular Season - 13 | Union St. Gilloise vs Gent | W | 2:0 |
| Jupiler Pro League | 10/22/22 12:45 | Regular Season - 14 | Union St. Gilloise vs Club Brugge KV | D | 2:2 |
| UEFA Europa League | 10/27/22 10:45 | Group Stage - 5 | Malmo FF vs Union St. Gilloise | W | 0:2 |
| Jupiler Pro League | 10/30/22 09:00 | Regular Season - 15 | Seraing United vs Union St. Gilloise | W | 1:2 |
| UEFA Europa League | 11/03/22 14:00 | Group Stage - 6 | Union St. Gilloise vs Union Berlin | L | 0:1 |
| Jupiler Pro League | 11/06/22 09:00 | Regular Season - 16 | Union St. Gilloise vs KVC Westerlo | D | 1:1 |
| Cup | 11/09/22 13:00 | Round of 32 | Cappellen vs Union St. Gilloise | W | 1:7 |
| Jupiler Pro League | 11/13/22 09:00 | Regular Season - 17 | Standard Liege vs Union St. Gilloise | W | 2:3 |
| Cup | 12/20/22 13:00 | Round of 16 | Union St. Gilloise vs Oostende | W | 2:1 |
| Jupiler Pro League | 12/26/22 09:00 | Regular Season - 18 | Union St. Gilloise vs Oostende | W | 3:0 |
| Jupiler Pro League | 01/08/23 11:30 | Regular Season - 19 | Anderlecht vs Union St. Gilloise | W | 1:3 |
| Cup | 01/12/23 13:45 | Quarter-finals | Union St. Gilloise vs Gent | W | 4:0 |
| Jupiler Pro League | 01/15/23 11:30 | Regular Season - 20 | Union St. Gilloise vs Antwerp | W | 2:0 |
| Jupiler Pro League | 01/18/23 11:30 | Regular Season - 21 | Cercle Brugge vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 01/21/23 13:45 | Regular Season - 22 | Union St. Gilloise vs OH Leuven | W | 1:0 |
| Jupiler Pro League | 01/28/23 13:45 | Regular Season - 23 | Charleroi vs Union St. Gilloise | W | 0:1 |
| Cup | 02/01/23 13:45 | Semi-finals | Union St. Gilloise vs Antwerp | W | 1:0 |
| Jupiler Pro League | 02/05/23 12:15 | Regular Season - 24 | Union St. Gilloise vs Zulte Waregem | W | 4:0 |
| Jupiler Pro League | 02/10/23 13:45 | Regular Season - 25 | Club Brugge KV vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 02/18/23 13:45 | Regular Season - 26 | Union St. Gilloise vs Standard Liege | L | 2:4 |
| Jupiler Pro League | 02/25/23 13:45 | Regular Season - 27 | KVC Westerlo vs Union St. Gilloise | L | 4:2 |
| Jupiler Pro League | 03/05/23 12:15 | Regular Season - 28 | Union St. Gilloise vs AS Eupen | W | 2:1 |
| UEFA Europa League | 03/09/23 11:45 | Round of 16 | Union Berlin vs Union St. Gilloise | D | 3:3 |
| Jupiler Pro League | 03/12/23 11:30 | Regular Season - 29 | Genk vs Union St. Gilloise | W | 1:2 |
| UEFA Europa League | 03/16/23 14:00 | Round of 16 | Union St. Gilloise vs Union Berlin | W | 3:0 |
| Jupiler Pro League | 03/19/23 11:30 | Regular Season - 30 | Union St. Gilloise vs KV Mechelen | W | 2:1 |
| Jupiler Pro League | 04/02/23 11:15 | Regular Season - 31 | Union St. Gilloise vs St. Truiden | W | 2:1 |
| Jupiler Pro League | 04/08/23 12:45 | Regular Season - 32 | Gent vs Union St. Gilloise | D | 1:1 |
| UEFA Europa League | 04/13/23 13:00 | Quarter-finals | Bayer Leverkusen vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 04/16/23 11:15 | Regular Season - 33 | Union St. Gilloise vs Seraing United | W | 2:1 |
| UEFA Europa League | 04/20/23 13:00 | Quarter-finals | Union St. Gilloise vs Bayer Leverkusen | L | 1:4 |
| Jupiler Pro League | 04/23/23 10:30 | Regular Season - 34 | Kortrijk vs Union St. Gilloise | W | 2:4 |
| Jupiler Pro League | 05/03/23 12:30 | Championship Round - 1 | Union St. Gilloise vs Antwerp | L | 0:2 |
| Jupiler Pro League | 05/06/23 10:15 | Championship Round - 2 | Club Brugge KV vs Union St. Gilloise | W | 1:2 |
| Jupiler Pro League | 05/14/23 10:30 | Championship Round - 3 | Union St. Gilloise vs Genk | W | 3:0 |
| Jupiler Pro League | 05/21/23 10:30 | Championship Round - 4 | Genk vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 05/28/23 05:30 | Championship Round - 5 | Antwerp vs Union St. Gilloise | D | 1:1 |
| Jupiler Pro League | 06/04/23 10:30 | Championship Round - 6 | Union St. Gilloise vs Club Brugge KV | L | 1:3 |
| Friendlies Clubs | 07/04/23 11:00 | Club Friendlies 3 | Nijlen vs Union St. Gilloise | W | 0:9 |
| Friendlies Clubs | 07/08/23 18:00 | Club Friendlies 3 | Monaco vs Union St. Gilloise | D | 1:1 |
| Friendlies Clubs | 07/15/23 06:00 | Club Friendlies 1 | Feyenoord vs Union St. Gilloise | D | 0:0 |
| Friendlies Clubs | 07/22/23 05:00 | Club Friendlies 3 | Union St. Gilloise vs Valenciennes | W | 1:0 |
| Jupiler Pro League | 07/28/23 12:45 | Regular Season - 1 | Union St. Gilloise vs Anderlecht | W | 2:0 |
| Friendlies Clubs | 07/30/23 08:00 | Club Friendlies 3 | Union St. Gilloise vs Aische | L | 0:1 |
| Jupiler Pro League | 08/04/23 12:45 | Regular Season - 2 | Standard Liege vs Union St. Gilloise | W | 0:1 |
| Jupiler Pro League | 08/12/23 10:15 | Regular Season - 3 | Union St. Gilloise vs OH Leuven | W | 5:1 |
| Jupiler Pro League | 08/19/23 12:45 | Regular Season - 4 | KV Mechelen vs Union St. Gilloise | L | 4:0 |
| UEFA Europa League | 08/24/23 12:30 | Play-offs | Union St. Gilloise vs FC Lugano | W | 2:0 |
