This is the 6875th most frequent Polish word.
gkm
"gkm" does not have a clear meaning as a standalone Polish word; it might be an abbreviation or a typo.
In this context, 'GKM' is used as a proper noun referring to a specific sports club.
GKM to popularny klub żużlowy z Grudziądza.
GKM is a popular speedway club from Grudziądz.
Here, 'GKM' remains a proper noun referring to the team, emphasizing the player's affiliation with it.
Zawodnik GKM zdobył złoty medal w mistrzostwach.
The GKM player won a gold medal in the championships.
In this sentence, 'GKM' again identifies the team, showcasing the event associated with the team.