License terms for ITERATE

ITERATE has a GPL license. Does that mean that the developers intend that any system using ITERATE must, itself, be GPL? I am not certain what follows from GPL licensing, since Lisp code isn't linked with library code. But I fear it might, or might require some cumbersome expedient like forcing people who distribute non-GPL code to hand off the ITERATE code and require recipients to compile it in themselves. Is there any chance that this could be offered under LLGPL or some less-restrictive license? Thanks, r