We were previously informed that the new US VISIT sytem is applicable to non-immigrants only, however, according to the web site from Department of Homeland Security, Green Card holders will be subject to it as well, as quoted below:
==================================
COLLECTION, USE AND STORAGE OF INFORMATION
The US-VISIT system will be implemented incrementally, but eventually will collect information on the arrival and departure of most foreign nationals such as: date; nationality; classification as an immigrant or non-immigrant; complete name; date of birth; citizenship; sex; passport number and country of issuance; country of residence; U.S. visa number, date and place of issuance (where applicable); alien registration number (where applicable); and complete address while in the United States. The information will be stored in databases maintained by DHS and the Department of State as part of an individual's travel record.
===================================
They mentioned "alien registration number (where applicable)".
==================================
COLLECTION, USE AND STORAGE OF INFORMATION
The US-VISIT system will be implemented incrementally, but eventually will collect information on the arrival and departure of most foreign nationals such as: date; nationality; classification as an immigrant or non-immigrant; complete name; date of birth; citizenship; sex; passport number and country of issuance; country of residence; U.S. visa number, date and place of issuance (where applicable); alien registration number (where applicable); and complete address while in the United States. The information will be stored in databases maintained by DHS and the Department of State as part of an individual's travel record.
===================================
They mentioned "alien registration number (where applicable)".