This package implements GPU optimizations of various LAMMPS styles. Section 3.7 of the manual gives details of what hardware and Cuda software is required on your system, and full details on how to build and use this package. The KOKKOS package also has GPU-enabled styles. This package uses an external library provided in lib/gpu which must be compiled before making LAMMPS. See the lib/gpu/README file and the LAMMPS manual for information on building LAMMPS with external libraries. The settings in the Makefile.lammps file in that directory must be correct for LAMMPS to build correctly with this package installed. The GPU package and its associated library was created by Mike Brown while at Sandia and ORNL, and by Trung Nguyen while at ORNL.