No problems. GC is what you need to re-enter US but...

来源: 于 2018-03-03 11:15:07 [旧帖] [给我悄悄话] 本文已被阅读：次

You may need to apply for an eTA before travel to Canada. Check this:

http://www.cic.gc.ca/english/visit/visas-tool.asp