ing out for more than 1 year. What forms/formalities to be done to maintain GC?

[stxvr]

One of my close relative recently got GC. She wants to go to home country for approx 2 years (but < 2 years). I heard that she need to do some formalities to maintain her GC as she is going out of US for more than 1 year.

What all forms and procedures she need to maintain the GC.

 

[GotPR?]

Look for I-131 on google.