Pseudo-Riemannian geodesic orbit nilmanifolds of signature $\boldsymbol{(n-3,3)}$

The geodesic orbit property is useful and interesting in Riemannian geometry. It implies homogeneity and has important classes of Riemannian manifolds as special cases, such as weakly symmetric Riemannian manifolds and naturally reductive Riemannian manifolds. The corresponding results for indefinit