How do I marry in Grenada ?

You can marry him and then you can sponsor him for his green card via consular processing. Alternatively you can sponsor him for his fiancé visa and then marry him when he enters the USA and then he can adjust status to get his green card. Both pathways take about a year with the fiancé path taking a little less time. Counsel anywhere in the USA can represent you and some of us charge a very affordable flat fee for representation through the lifetime of the case.