A Florida serial killer who targeted older, gay men in a months-long killing rampage 25 years ago is set to be executed.

Gary Ray Bowles, 57, is scheduled to die by lethal injection Thursday night at Florida Day Prison in Stark.

Bowles began his eight-month killing spree in March 1994 and left his victims along Interstate 95, earning him the moniker “the I-95 killer.”

Prosecutors said he preyed upon gay men for money, then eventually snapped and killed them. In each case, Bowles stuffed the victim’s throat with objects, including rags and a sex toy, authorities said.

“He probably enjoyed it after a while,” Daytona Beach Detective Thomas Youngman said. “Why do you kill people after the first one? The first one could be a mistake, maybe. But then the second, all right, I’ll maybe give you that. But the third, fourth, fifth and sixth? When do you stop?”

Bowles ultimately was captured when he left behind a paycheck stub at the scene of one of the murders. He confessed to killing six men across three states, with victims in Florida, Maryland and Georgia.

He was handed the death sentence for the November 1994 murder of Walter Hinton — who was his final known victim, slain in Jacksonville Beach, Florida.

With Post wires