I think we need an IP lawyer to weigh in. My feeling is no, it’s not OK to distribute a design that you have reproduced with GemCad. I doubt that it’s legal to distribute a copyrighted novel reproduced in Braille. Consider the definition of fair use – it’s not fair use if it impairs the copyright holder’s market. If you reproduce one of Jeff Graham’s books in GemCad format and distribute it, why would anyone buy the book?