If you're quitting - I don't really see the point of reporting anything. I would however, make sure that your current co-workers that are being discriminated against know it's happening (if it's happening). You may consider the fact that there may not be any discrimination going on at all...can you prove that some employees are making less than their male counterparts based solely on sex and not actual merit, contract negotiation, or earned bonuses? (I know I have been in more than one situation where I was making more not because I'm male - but simply because I asked for more)