Sir, I want to ask about your software using CPU or GPU when used? Please your answer. 
Currently, it doesn't have GPU support but it's in the roadmap.You can follow his tool's development in it GitHub Repository, here: https://github.com/Coding-Enthusiast/FinderOuter
And here's the Roadmap which is aiming for GPU support in version 2.0: https://github.com/Coding-Enthusiast/FinderOuter/issues/47
Current release version is 0.18.0