We study the ergodicity of the three-dimensional stochastic Ginzburg--Landau (SCGL) equation on the torus driven by white-in-time noise that is highly degenerate in Fourier modes and spatially localized. Here spatially localized means that the noise acts only on a prescribed subdomain of the physical space. The proof combines the Malliavin calculus approach of Hairer and Mattingly and some tools from control theory.