Thats great, congratulations. Now be aware that she needs to permanently reside in the US and only make temporary visits India. Doing anything else may constitute intent to abandon residency and cause her GC to be revoked.
Unfortunately there are few hard and fast rules covering exactly what constitutes abandonment, so its hard to be specific and say things like "spend at least 6 months in the US each year". As a minimum, she definitely would not want to be outside the US for more than 1 year without the benefit of a reentry permit.