Can someone enter the US for GC activation and stay for maybe 2 weeks then leave to deal with relocation issues? The process may take >6months. Would there be any issue when returning and how it affects citizenship?
There is such a concept. It's just that the word is not "activation", it's "admission" (to lawful permanent resident status). Different word, same concept.There is no such concept as "activation" of a GC.
Can i travel out of the US within 2 weeks and return after 3 months or so?
do you need to stay 3 months to establish resident status? where is this?
Maybe, maybe not. If you take a short trip outside the US within the first 3 months after entering with your GC, they won't hold that against you. But if you leave within the first 3 months and go away for several months, they may make an issue of it.do you need to stay 3 months to establish resident status? where is this?