Dee ihe na-aga n'ihu maka paragraf a - Na FIL European Luge Championships, Gruber meriri nrite itoolu na ọla edo abụọ (Ndị nwoke na-agbakọ: 2008, 2014), ọlaọcha anọ (Ndị nwoke na-agbakọ: 2004; Mixed team: 2004, 2006
, 2013), na ọla nchara atọ (Ndị nwoke na-agbakọ: 2006; Mixed team: 2012, 2014).