The P.E.Op.S. soft gpu plugin is based on Pete's soft gpus for Windows and Linux. This is mainly used for the Zinc emulator.
From the readme file:
Windows: copy the file "gpuPeopsSoft.dll" into the main emu
Linux: copy the file "libgpuPeopsSoftX.so.1.0.x" or the file
"libgpuPeopsSDL.so" (FPSE SDL version) into the main emu plugins
directory. Copy the file "gpuPeopsSoftX.cfg" into the main
emu "cfg" directory, or into the main emu directory, or into your
Notes for use with ZiNc:
You have to use the "--renderer=..." command line switch to load
the plugin (or rename the plugin DLL to "renderer.znc" and copy it
into the main ZiNc directory). For configuration you can specify
the Peops .cfg with the ZiNc "--use-renderer-cfg-file=..." command
line switch, or (Windows only) simply don't specify a .cfg file,
then automatically the settings in the Windows registry will be used.
Of course that will mean that you will need some Win psx emu to
configure the plugin.