Are you seriously trying to compare Roman civilisation with that of Gaul ? Also, political structure and organisation are a vital part of the way of life any society and way of life is a part of the culture.
So no, before the Greeks and Romans, Europeans did not have a civilization comparable to Iran, India, China, Egypt etc.
Word of advice, India, China and Egypt would also be classified as a "barbarians" by the romans, the term,as used in that context, doesn't mean exactly what you think it means.And yes, there were advanced culture in Europe before (or parallel) with the Romans & Greeks.
Anyway, I read this thread hoping for info about traveling to Iran, and got absolutely everything else, but that