Unverified60% confidenceFactExact time
GPL has gone through three major versions: GPLv1 (1989), GPLv2 (1991), and GPLv3 (2007).
2
Sources
60%
Confidence
Long-term
Relevance
8/19/2026
First Seen
Sources
Related Claims
VerifiedIf firmware uses GPL v2/v3, derivative versions developed based on that firmware must likewise open-source their code under GPL — this is the core mechanism of Copyleft's viral nature.76% similarUnverifiedThe Linux kernel still uses GPLv2 to this day, and Linus Torvalds has explicitly stated that he will not migrate to GPLv3.73% similarUnverifiedGPLv3引入了安装信息条款（反锁定条款），要求嵌入式设备必须允许用户替换修改后的GPL软件70% similarVerifiedGPL's copyleft clause requires that derivative works also be released under the GPL, giving it an infectious nature.69% similarVerifiedGPLv3 is a strong copyleft license released by the Free Software Foundation, requiring that derivative works based on its code must be distributed under the same license as open source.68% similar
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