The Deutsche Go Zeitung is the main magazine about Go in German. It is published 6 times a year by the German Go Federation with 48, 56 or 64 pages each issue. In 2006, it reached the milestone of its 80th published volume since 1909, when it was founded by Leopold Pfaundler. It wasn't published during the two World Wars.
The "Deutsche Go Zeitung" contains reports from tournaments and events around Germany, some international news, about 1-4 commented games (pro or amateur), some tsumego and miscellaneous announcements and articles.
PDFs are available here. However, beginning with 2/2012 and at least one year old.