Move to US
A green card is for an LPR, Legal Permanent Resident. If you go through all the requirements to get your wife a green card she would have to be living in the USA to get it and maintain her residence in the USA to Keep it. Also, you would have to move there first a set-up a domicile before she could even in.
There are variations on this theme, for example if you an employee of the US Govt. etc, etc. but what I stated above is true for most generic cases.