The GPL is not "infectuous" or "viral" or any of that nonsense. The GPL does not spread on its own. Your code isn't going to catch copyleft by sitting next to some free software.
Ah, sorry for being unclear, I wasn't aware that this was such a loaded term. I am not against the GPL, and I don't mean that in a negative way. I meant that in the sense that it dictates conditions for the "combined work", not only the source code directly under the license.
