Is there a minimum number of months to stay in the US after receiving your greencard, before you can travel?

Question

Travel means, going on a trip, getting out of the US.

Answer 1

Definitely none. Even if you don't have your green card yet and you just arrived here in the US today, you could leave tomorrow, AS LONG AS you have your valid Immigrant Visa attached to your passport.

If you prefer to wait for your green card to arrive before traveling, that's fine, too. The point is you can leave any time you want to. You can still re-enter the US as long as you will return in less than a year. If you plan to stay away from the US longer than 1 year but less than 2 years, you need to apply for a reentry permit with the USCIS. Longer than 2 years, you will be considered as having abandoned your permanent resident status.

Here's a list when you may be found to have abandoned your permanent resident status. If you:
-Move to another country intending to live there permanently.
-Remain outside of the US for more than one year without obtaining a reentry permit or returning resident visa. However in determining whether your status has been abandoned any length of absence from the US may be considered, even if it is less than one year.
-Remain outside of the US for more than two years after issuance of a reentry permit without obtaining a returning resident visa. However in determining whether your status has been abandoned any length of absence from the US may be considered, even if it is less than one year.
-Fail to file income tax returns while living outside of the US for any period.
-Declare yourself a “nonimmigrant” on your tax returns

So, to sum it up, you can leave any time you want to, but you have to return before 1 year is up (or 2 years with a re-entry permit).

Answer 2

Travel outside the US must be for short periods for purposes of business and tourism only to guarantee the residency status in America.