Generate novel crystal structures using GPSK-300, a multimodal DiT that operates on 3-channel 32³ reciprocal-space grids (Re(F(hkl)), Im(F(hkl)), 1/d²). Fully invertible representation: lattice parameters and atomic positions are encoded directly in the generated grid. Conditions on composition, crystal system, space group, band gap, formation energy, e-above-hull, and magnetic ordering.