An intoxicated man with a loaded firearm has been arrested on the grounds of a New Fairfield school.  The Resident State Trooper's Office was notified of the incident at the Consolidated School yesterday afternoon by the school resource officer, who discovered 55-year old Richard Logo smoking on school property.  The New Fairfield man was charged with possession of a weapon on school grounds and carrying a firearm while under the influence of drugs or alcohol.   State police says at no time were students or faculty in immediate danger. Logo was taken to Danbury Hospital where he was processed. Police also seized his firearm and revoked his pistol permit.  He was released on bond for an April 12 court appearance.