I have contributed to GhostBSD in the past by submitting code and performing testing. The progress bar in Software Station is one example of my work.
Many of my ideas tend to be too ambitious or wide-ranging to include directly in GhostBSD, so I have pursued them through my own independent projects. When there is meaningful overlap, I do try to bring certain ideas back into GhostBSD. That said, most of my contributions to the project now take the form of helping others resolve issues and offering alternative perspectives to support discussion and improvement.