Need information for my german spouse please help me please thanks :(

Hello

I am from Pakistan and my girl friend is living in Germany almost for 9 years. Basically she is from Philippines. She is having a Filipino Passport  in Germany with a "Permanent settlement permit" (Niederlassungserlaubnis) and she had Regular work as well. Recently we got married My girl friend is wishing that if i can be with her in Germany. Before applying for visa application i need an expert Guidance about our situation. What is your advice for me to be together with her in Germany and will it be possible that i can go to her despite all the information above? and how long it can take?
                 
             Kindly Please Guide me for my situation 
                        Thanks in Advance.

German Auslaenderrecht (laws for foreigners in Germany) is very complicated and not always clear, even to the experts.
You should consult a good lawyer, he/she will be able to explain what you have to do!