Correct in some way. Given the source code, e.g. Drupal (GPL v2), if you develop a proprietary module that can be shipped independently but relies on the Drupal

Correct in some way. Given the source code, e.g. Drupal (GPL v2), if you develop a proprietary module that can be shipped independently but relies on the Drupal Core or other GPL module, you still not violate GPL. It doesn't matter you need to compile it or not, at the end, most scripting language is compiled to bytecode in some for of JIT. I mentioned GPL in general, not dissecting to the various version, because the parent reply was about Google's fear of GPL (in general).