That's right -- a GC-holder moving out of the US would normally relinquish the GC and stop paying US taxes at that point. I don't recommend trying to hold onto

That's right -- a GC-holder moving out of the US would normally relinquish the GC and stop paying US taxes at that point. I don't recommend trying to hold onto a GC while living outside of the US... this is one of those areas where there's no strict rule on what's "okay", just vague guidelines, so if you are trying to hang on to a GC while living outside the country for a few years by visiting twice a year, a DHS official in a cranky mood is perfectly able to decide you're "cheating" and eject you from the country... which will not be a good thing to have on your record if you ever want to come back. I'm American but moved to France w/ my non-American wife, and we tried to hang on to her GC for a while like this... but it was far too nerve-wracking.