Let me quote from Wikipedia here: "On 8 September 2005, the Seoul Central District Court ruled that the GPL was not material to a case dealing with trade secre

Let me quote from Wikipedia here: "On 8 September 2005, the Seoul Central District Court ruled that the GPL was not material to a case dealing with trade secrets derived from GPL-licensed work. Defendants argued that since it is impossible to maintain trade secrets while being compliant with GPL and distributing the work, they are not in breach of trade secrets. This argument was considered without ground."