confirmed on the official Schalke04 website, also on eventim.de
Gelsenkirchen concert confirmed; German ticketing details
Good news for German fans - after ten days of uncertainty, the Gelsenkirchen concert on 3 August 2009 has been confirmed by the promoter. The show was initially included in the itinerary posted by U2.com, and then quietly taken down a few hours later.
In addition, the ticket general sale date has been announced for both Gelsenkirchen and the other 360° Tour show in Germany, 18 July 2009 in Berlin. Sales will begin on Friday, 27 March from Eventim.de.
(taken from u2gigs.com)