Hi, after coming back from 2 year expat program how long I have to stay in the USuntil I can leave for a short trip (1-3 wks) again w/o loosing gc?

It is largely in the discretion of immigration inspectors at the port of entry to determine whether to challenge your right to return based upon your period of absence in the past. That being said, the longer the period of time before going back outside the United States, the better. Ideally you would not go out for 6 months, but that is a choice for you to make. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.