[1] He finished the season in his home country of Poland, on loan with Czarni Słupsk.

[3] He signed with reigning PLK champion and EuroLeague team Stelmet Zielona Góra in the 2015 offseason.

On 19 February 2018, Torún won its first trophy when it beat Zielona Góra 88–80 in the final of the Polish Cup.

[6] On July 18, 2024, he signed with Anwil Włocławek of the Polish Basketball League (PLK).

[7] Gruszecki was selected for the Polish national basketball team for EuroBasket 2015 and 2017.