From 1993 to 1995 Gilewicz played for FC St. Gallen. He later moved to VfB Stuttgart where he stayed for two years before once again moving to Karlsruher SC. He played his final game for Karlsruhe in the final of DFB-Pokal, a game he entered late on as a substitute.
He then moved to Austria in 1999 where he played for FC Tirol Innsbruck. In the 2000–01 season, he scored 22 goals for the Tyroleans and was the league's top scorer. He stayed at the club until it went into liquidation. From 2002 until 2005 he was with Austria Vienna. Next he played for FC Superfund. He has won the Austrian title four times and has won the Austrian Cup twice and is the Polish all-time top goalscorer in Austrian football.
Most recently he played for Polonia Warsaw before retiring in summer 2008.