Stoiber was a student at Ignaz-G Ã 1\/4 nther-Gymnasium in Rosenheim , where he received his Abitur ( high school diploma ) in 1961 . Stoiber attended the Ignaz-G Ã 1\/4 nther-Gymnasium in Rosenheim , where he received his Abitur ( high school diploma ) in 1961 , although he had to repeat one year for failing in Latin .