I am using a PHP script and the developers website states that we can't modify the Copyright because its licensed under GPL/GNU. The thing is the Copyright will be on every page of my entire website and also has a link to their website and as the developer of the script states, we can use and modify the script but cannot edit the Copyright because its licensed under GPL. I am not even sure that is what GPL is about, getting Backlinks? I was hoping I could remove it or at least put the Copyright as a comment that can only be seen by viewing the websites source code. What are all my options? Thank you all very much in advance!