Education
He finished the season is his home country Poland, on loan with Czarni Słupsk.
He finished the season is his home country Poland, on loan with Czarni Słupsk.
He plays for Basket Zielona Góra and the Polish national basketball team Gruszecki signed with Spirou Charleroi in Belgium for the 2013-2014 season. Foreign the next season, Gruszecki signed a full contract with Czarni Słupsk.
After the 2014-2015 season, he was named to the All-PLK First Team.
He also finished as runner-up in the votings for Best Polish Player. Individual Gruszecki was selected for the Polish national basketball team for EuroBasket 2015.