I think he did. I think he may have overseen and helped dooku build the Death Star, perhaps with his ideas and some designs. If you think about it, most of his technology and advances resemble the death star. I think he may have been the brains behind it after Dooku had the plans delivered to sidious. grievous had to know it was being built because he had a huge fleet that was also being used during the clone wars. Grievous was the mastermind of the clone wars and he was looking for the perfect weapon, at one time he was on geonosis and some speculate that he came up with the idea for it and passed it on to the geonosians. Sidious used GG to build the death star and his resources, but not only him, he also used many of the nemodians parts and money from the trade to fund the construction. the death star wars a secret project of course, but I do believe that GG knew about it and helped build it. discuss. SWA.