Eric Turgeon, the project owner of GhostBSD, also serves as the lead maintainer of the MATE desktop environment for both GhostBSD and FreeBSD. He is the most appropriate person to consult for guidance on how to contribute effectively.
As for myself, I am no longer actively involved in open source development. However, I continue to create small applications, such as mixergui, primarily to inspire others and support the community in modest ways.
Thank you for stepping up to volunteer your time to make GhostBSD better.