Most of the tours are given in Swedish, but tere are texts about every room to borrow, available in English, German, French and Russian. You are only allowed access to the House with a tour guide.
From June 23 - August 19 the tour is guided in English at 1 pm.
Tickets are purchased in the gift shop in the wing buildings (open from 11 am).
Varying times, please see this link: gunneboslott.se/guided tour