Gene is still on probation for the rest of his life. After Cali was killed, LE went to interview him since he lives on Staten Island, pretty much a routine check up and if he knew anything about Cali being shot. That is where the media started to put Gene's name in the papers. LE were just covering all their bases and the Media got wind of it and started to run with it.
Gene was sentenced under the old rules and was eligible for parole after 50% of his time was completed. He was turned down twice and then finally released. I believe he has 20+ years of parole. Parole is different them supervised release. They can basically bust his balls for whatever they want and the probation department can lock him up. On supervised release only a judge can.
