The Green Card you have is not valid, and you've lost the Permanent Resident status. Sorry.
There's a small probability that the record keeping system has let you "fall through the cracks", but you shouldn't bet on it, and there are no tricks to exploit it. It's like betting your life on a lottery at this point.
Expect to be denied entry unless your nationality is in a country with a Visa Waiver program and the CBP agent is in a particularly good mood. Even then, the attempt to use an invalid Green Card may blacklist you, and then you'd be denied entry even if you qualify for Visa Waiver. It all depends on how the CBP agent sees your attempt: honest mistake vs. blatant fraud.
Given that you have posted the question already, you know that you're attempting fraud. You should have asked an immigration lawyer, not online.
Basically, if a federal agent with time on their hands happens upon your question, they have a good reason to subpoena the records and get your real identity, since you're basically admitting publicly to considering immigration fraud. Posting this question online was an extremely foolish thing to do. I would ask the site admins to wipe the question.