GNU actually refers to 'grand national unity' in this context, one of the three fundamentals for Korean unification outlined in the 1972 North-South Joint Declaration (the other two being peace and independence).
Based on the screenshots, gnu.rep.kp appears to be a website for the Pyongyang Broadcasting Station.
> Dafeng strange fruit spreads across the Great Hall won the People's love and young manhood of the world's largest hot in that reverence Kim Jong-un...
North Korean is a different dialect so it's no surprise Google struggles with it. It looks like a news/propaganda site.
Not just the dialect that's tough to translate, but also the diction. DPRK propaganda tends to use a lot of bombastic language -- it shows in their English press releases as well.