The 45-year-old said he woke up in intensive care strapped to the bed to stop tubes from falling out of his arms and was repeatedly injected.
His latest stint in rehab was organised by TalkSPORT presenter and former England cricketer Ronnie Irani and Radio 2 presenter Chris Evans, a long-term friend of Gascoigne.
The move came following a charity appearance in Northampton during which the star appeared unwell and shaking, before breaking down and sobbing on stage in front of a room full of fans.
Paul Gascoigne: "Three doctors didn't think I would make it.
"It has got to inspire me to never let this happen again.
"I've come through that - death. I was dead.
"I thought I was on my way out. I looked like a corpse. I was a total wreck."