babaal, marrying in nepal while you have a green card is indeed a problem. the best possible way for you to bring your spouse over here is ask her to apply for a non-immigrant visa like F-1. there has been lots of noise regarding lack of facilities for married green card holders in USA and who have their other half back home. so far there has been no changes in the law. US citizens have the facility of fiance visas and H1 holders have H4 visas which allow them to bring their spouse over to the US. but there is none for green cards. you have to wait forever. in many cases, the green card holder becomes a citizen and the spouse is still languishing in nepal. the best option is to either wait till you become a citizen or have the spouse apply for a visa (F-1) and hope for the best.