Gibside is an estate in Tyne and Wear, North East England. It is located in the valley of the River Derwent on the border with County Durham, between Rowlands Gill and Burnopfield. The estate is the surviving part of a Georgian landscaped park, primarily created under the ownership of Sir George Bowes and designed in large part by Stephen Switzer and W…Gibside is an estate in Tyne and Wear, North East England. It is located in the valley of the River Derwent on the border with County Durham, between Rowlands Gill and Burnopfield. The estate is the surviving part of a Georgian landscaped park, primarily created under the ownership of Sir George Bowes and designed in large part by Stephen Switzer and William Joyce.