Outdated doc for GW?
In https://wiki.fysik.dtu.dk/gpaw/exercises/gw/gw.html there is a line that says "Currently the implementation of GW in GPAW does not support magnetic systems, so make sure your ground state calculation is performed without spin polarization." However, the arrays of self-energies are indexed as gw_skn, suggesting that spin is incorporated.
Is the doc outdated or does the GW module just run the calculations but isn't tested for spin-polarized systems? The code strongly suggests spin-polarized systems are supported (at least in the 'GW' fxc mode). If this is the case, that doc page needs an update...