  Quantum gas microscopy has emerged as a powerful new way to probe quantum
many-body systems at the microscopic level. However, layered or efficient
spin-resolved readout methods have remained scarce as they impose strong
demands on the specific atomic species and constrain the simulated lattice
geometry and size. Here we present a novel high-fidelity bilayer readout, which
can be used for full spin- and density-resolved quantum gas microscopy of
two-dimensional systems with arbitrary geometry. Our technique makes use of an
initial Stern-Gerlach splitting into adjacent layers of a highly-stable
vertical superlattice and subsequent charge pumping to separate the layers by
$21\,\mu$m. This separation enables independent high-resolution images of each
layer. We benchmark our method by spin- and density-resolving two-dimensional
Fermi-Hubbard systems. Our technique furthermore enables the access to advanced
entropy engineering schemes, spectroscopic methods or the realization of
tunable bilayer systems.
