Squaregonial jaw with gonial angle will leads to:

In the horizontal growth pattern, there is a tendency for the mandible to rotate upward and forward. The lower anterior facial height is relatively short with a tendency for deep bite.  Such persons have a squarish face, a low mandibular plane angle, well-developed jaw elevators, increased biting force, and broad dental arches. Ref: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities THIRD EDITION Om P. Kharbanda, pdf no 670