No one is aware
of any problem. However, I remember reading a lawyer saying that if the layoff was because of poor performance, then there could be a problem. Two months seems ok time, and I still need to hear about a case of someone whose GC got revoked because of being laid off, or having quit their jobs too early. The sentiment in this board is that if one is laid off, there is no bad consequences for the GC. No problem about collecting unemployment insurance. Said all that, I wouldn't worry about the GC now and I'll focus about finding a new job.
Good luck,
