May a GC holder live outside the US for more than a year? Help!!

[Nightingle]

I want to know whether a Green Card holder may live outside the US for more than a year. Or if he needs to do that, what procedure to follow. Any prior permission needs?

So far i know, stay over 6 months of duration are not counted in the Naturilization process of a GC holder.

Can anyone help me?

 

[Triple Citizen]

Re-entry permit.

Any prior permission needs?

 

[namecheckvictim]

You can stay upto two years outside US on a RP.