Retired cop wounded by gunman in 1991 worried shooter will be paroled

The gunman who sentenced an NYPD officer to a world of hurt in a 1991 ambush could soon find himself a free man.

Retired cop Paul Freitas, 55, fears there’s a very real chance that George Hill will be released when the shooter appears before the state Parole Board this year for a fourth time.

“He…