Learn the porting of ENZO solvers to GPU. ENZO is a block-structured adaptive mesh refinement (AMR) astrophysical fluid dynamics code used for simulating cosmological structure formation. It is one of the most commonly used community code in astrophysics. We have ported the PPM Hydrodynamics and Magnetohydrodynamics solvers to GPU and integrated the GPU solvers fully into the AMR framework. This talk will describe the porting strategy and performance results.