Warning can be ignored, do you have any problem with run time execution? do you get any run time errors?
In order to ignore the warnings, for example with GCC[https://stackoverflow.com/questions/1452671/disable-all-gcc-warnings] you can disable warning using -wno-xxx which xxx is the warning source.
To activate CPU parallelization and GPU acceleration in ABAQUS, you will need to install CUDA and perform certain configurations in the environmental path. Please refer to attached tutorial.