Most all wheel drives only engage 4wd when traction is lost usually by means of a viscous coupling or electrickery. So I suppose the gaylander could be described as AWD.
Proper 4wd has front and rear propshafts and some form of difflock. in LR case this is a central diff which locks the propshafts together However it is still possible to spin 1 wheel on each axle usually referred to as been "cross axled" or for all 4 wheels to spin in mud or on ice, gravel etc.
some 4x4's have front centre and rear diffs The merc G wagen been one of them.