Grzegorz Gajdus (born 16 January 1967 in Skórcz, Pomorskie) is a long-distance runner from Poland, who represented his native country at the 1996 Summer Olympics in Atlanta, Georgia. He ran his personal best (2:09:22) in 2003, when he finished in fourth place at the Eindhoven Marathon.
| Representing | |||||
|---|---|---|---|---|---|
| 1992 | Italian Marathon | Carpi, Italy | 1st | 2:12:36 | |
| 1993 | London Marathon | London, United Kingdom | 3rd | 2:11:07 | |
| New York Marathon | New York City, United States | 9th | 2:15:34 | ||
| 1994 | London Marathon | London, United Kingdom | 5th | 2:09:49 | |
| Helsinki, Finland | 17th | 2:14:55 | |||
| 1996 | Eindhoven Marathon | Eindhoven, Netherlands | 2nd | 2:11:27 | |
| Atlanta Olympic Marathon | Atlanta, Georgia, U.S. | 61st | 2:23:41 | ||
| 1997 | Eindhoven Marathon | Eindhoven, Netherlands | 4th | 2:13:04 | |
| 1998 | Eindhoven Marathon | Eindhoven, Netherlands | 1st | 2:10:51 | |
| Vienna Marathon | Vienna, Austria | 2nd | 2:09:45 | ||
| 1999 | Zagreb Marathon | Zagreb, Croatia | 1st | 2:16:40 | |
| Lake Biwa Marathon | Lake Biwa, Japan | 3rd | 2:11:37 | ||
| 2002 | Eindhoven Marathon | Eindhoven, Netherlands | 2nd | 2:10:49 | |
| 2003 | Eindhoven Marathon | Eindhoven, Netherlands | 4th | 2:09:22 PB | |
| 2005 | Gdańsk Marathon | Gdańsk, Poland | 1st | 2:23:47 | |
| Warsaw Marathon | Warsaw, Poland | 1st | 2:14:50 | ||
| 2006 | Gdańsk Marathon | Gdańsk, Poland | 1st | 2:19:40 | |