I think you came to the right place. The German consulate or embassy in Spain can provide you with extra information, but they will ask you to instruct a lawyer to help you out.
Given that you are German citizen, your husband will be able to live in Spain with you with no extra requirements or permissions. Even if he was not married to you (being an EU citizen) he would not have much trouble to obtain residence in Spain. But there is a procedure for everyone and paperwork to do.
Let me know where and when you are planning to come to Spain and we can take it from there.
