Pakistan's Prime Minister Syed Yusuf Raza Gilani arrived here Monday on a two-day visit to the Sultanate of Oman to discuss closer collaboration in trade and economy. Prime Minister Gilani will later in the day have an audience with the Sultan Qaboos bin Al-Said at the official retreat of Bait-al Barka Palace and hold talks with the Omani leaders on Tuesday, the Associated Press of Pakistan reported.