Hi I have my girl friend in Nigeria I want her to move here what do I need to do

OK if you are a US citizen, and you have met your girlfriend physically within the last two years, then you can sponsor her for a K1 fiancée visa. If you are only a green card holder, you can sponsor her provided that you get married to her either in Nigeria or in the United States. You should retain counsel to handle all the steps so that your case is processed smoothly and without delay and complications.