GCC C nested functions do have access to outer lexical scopes: http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Nested-Functions...

But dynamic scope is a wholly another thing, most languages with closures don't have it. One exception I know is Clojure where you can declare variables explicitly as dynamically scoped, and it can be used eg as an alternative to passing around a context map when handling requests in a server style program. (And Elisp had dynamic scoping first, then closures added as a add-on feature)