Properties of the gas disk in our Milky Way–like galaxy (﹩{M}_{200}={10}^{12}\,{M}_{\odot }﹩) at 1 Gyr, shortly after the onset of a CR-driven central outflow. The MHD simulations account for CR injection at supernova remnants and follow their advection with the gas and anisotropic diffusion along the magnetic fields relative to the gas. In the top panels, we show cross-sections of gas properties in the midplane of the disk (face-on views) and vertical cut-planes through the center (edge-on views) of the gas density (left), CR energy density (middle), and CR-to-thermal pressure ratio (right). In the bottom panels, we show face-on and edge-on projections of observables: gas surface mass density (left), pion-decay-induced gamma-ray surface brightness from 0.1 to 100 GeV (middle), and secondary IC surface brightness in the same energy band (right). Both gamma-ray maps do not show the CR-loaded outflow in the form of hadronic gamma-ray bubbles.