as long as it's regional trains like RE Regionalexpress, (not the IC Intercity or EC Eurocity ones!), busses, trams (S-Bahn), tube. Train is free from Düsseldorf or Dortmund (or other parts of the Ruhrgebiet)
on match day until 3 in the morning next day as the fare is included in our match ticket (but not totally from Cologne, as Cologne belongs to a different local transport network (probably about 5€ to the "network border" at Rommerskirchen, if I am not mistaken and then free for the rest of journey to Gladbach).
RE takes about 1h 20 mins from Dortmund to Mönchengladbach, check with Deutsche Bahn for train times (English version)
http://www.bahn.de/p_en/view/index.shtml