1) A regional spelling of gable, defined in the OED as the triangular piece of wall from the eaves to the summit, although colloquially the ‘gable end’ seems to refer to the whole wall.
1420 a upperyghte gavel, York
1617 the West gavle ende, Brafferton
1811 to build up the Gavel end next the ground where part of the premises was taken for widening the street, Beverley. The term may have been used for the triangular pieces of stone which formed the gable: 1698 three free stone gavells hewing and leying on, Pickering. The elision of the ‘v’ was responsible for an unusual spelling: 1728 the gaole end of the barn newly erected, Tong