Try to get hold of some phenibut, it's a GABAb agonist, long duration of action.
One problem with GBL/GHB WD that makes it such a cunt, is the really short half-life of the stuff, withdrawal within a few hours at most after the last dose if physically dependent. Makes plasma levels really, really unstable, and you're guaranteed to withdraw repeatedly several times a night, possibly start seizing if you don't respond asap.
And the MASSIVE adrenergic storm that acute, heavy-duty G withdrawal causes...jesus fucking christ. Severe tachycardia and BP through the roof. Put me in hospital and the look on the docs faces was not encouraging when they were taking BP/heart rate. Potential for paranoid psychosis even, delirium, I remember part of it, and It'd caused me to go into full on fight or flight mode, and there was nowhere to go, voices of docs 'heard' saying the most unpleasant things about what was to be done to me, I'm thankful they eventually tranqued me with something, because I was ready to hurt someone if they came close. Just glad nobody was harmed other than myself, although I'd sooner that hadn't happened either.
Been a few rounds with GBL W/D, although that was the worst. Vaulting over a railway parapet, which I hadn't realized was anymore than a normal stone wall, into a fuckton of thorns, after getting (actually) chased by a load of pikey shitbags baying for blood, and having to drag my bruised and crunched-up arse up the embankment after hiding for some time, withdrawal getting worse and worse, while those bastards hunted, shouting and grunting and generally sounding like a turd with vocal cords and the cognitive capacity of a cow with end-stage BSE, that was NOT fun. It'd have been fucking shite if I'd been stone cold sober and healthy, but going into the start of GBL W/D on the way home, at night, with it getting worse...awful. Just awful. Pikey chavscum usually don't bother if one isn't an easy target, if they think there's a chance of getting their head kicked in, if the intended victim legs it and they realize that their prey is going to keep going, and leave them in the dirt, they often fuck off, unless they grossly outnumber their target then usually lazy, half-wit cowardly pieces of shite.
Well they still are, as a general principle. But that particular infestation was persistent, hunting for a target they knew to be around, close, but just couldn't find. (Probably not too obvious, someone vaulting over a railway parapet with a whopper of a drop, then crouching in the brambles and ballast stones that served as my unintended and thoroughly unwanted landing position, dressed in camo pants and camo coat, at night, by a pack of probably drunk as piss, definitely thick as dog shit in liquid helium arse-born whore's rejects)
Other times, still awful all round, but never that bad, wondering if I was going to stroke out before I lost the plot completely, in a hospital ward, smashed up and sliced to bits by thorns.
Although I had a friend devote her time to me, at a couple of other times, she let me 'sleep' over at her place, made sure I was in the room with her, using smaller and smaller amounts of G until it ran out, even though I had to plug the stuff, nursing me with beer and spirit. Pretty much only let me out of her sight to shit and piss.
Have had to do it on my own before, couple of times, not so severe as either of the above, but thankfully, whilst prescribed strong opioids (2xOC80s daily, at the time, changed to morphine and lower dose oxy for breakthrough later, as I prefer morphine), as well as anticonvulsant meds and had some lorazepam and nitrazepam around too, which of course, have anticonvulsant effects of their own, clonidine, and gabapentin, and a muscle relaxer, tizanidine, which along with the clonidine, was particularly helpful, as it works the same way (as clonidine), on alpha2 adrenoreceptors, lowering noradrenaline release, blocking a fair bit of that awful sympathetic storm G withdrawal causes.
And of course, went and got a fair stock of booze, few bottles extra opioid-based cough mixtures, whatever the strongest types I could find from the pharmacies on the way and way back to get the booze. Thought, not exactly clear-headed, but you know how it is in the throes of G withdrawal, 'desperation' is too mild a word, and I could care less about the interaction between alcohol and chlormethiazole at the time. Thought more or less 'if it hurries it the fuck up, at least it'll be over' during one really severe solo WD, although with meds, and some old baclofen, that I had been given a script for, before I was rx'd the tizanidine, because I found the baclofen fucking worthless for the muscle spasm in my calf.
Cold turkey is the absolute pits though, if booze and fags are all you have, it is one of the worst withdrawals I've ever experienced.
Only one worse, is barbiturate withdrawal, whilst in jail, cold turkey, from barbital. I had enough (originally got hold of 30g, free acid form) to taper, and I knew to do so. But happened to get banged up on remand for something. And went into SEVERE DTs, it's caused some permanent memory damage, and almost killed me at the time, so delirious for so long, I lost so much weight that by the time I came round and could SEE how much I'd lost, I don't think I'd have lasted much longer, and could well have starved to death.
Opiate WD, AND barb WD together....fucking christ. I was on the heminevrin too, although I'm not sure that contributed much of anything to WD, I've asked why in NSPD, and the denizens therein thought 'what the FUCK', how can I take it daily, and get away with dropping it for a week, if I have had to, without WD; the only issue being that the seizures that it is preventing, are no longer being held back, it hasn't caused me WD, (this, generally, I mean, otherwise just on regular meds, a benzo SOMETIMES, but only seldom, I control my use of benzos very strictly indeed, having been through a physical WD from lorazepam, and going into seizure in a GPs office, after I asked to come off it, and had tapered myself too rapidly, as well as dropping, with a less severe one, right close to the pharmacy to cash in the benzo rx given as a result. Never want to go through that again) so no tolerance or dependence to benzos, excluding that as a cause. Alcohol..I drink, but rarely. And usually not more than a few beers, which tends to get me pissed as a motherfucker, if I drink the equivalent amount in spirit.
Other than that combined barbiturate/opiate withdrawal, cold turkey (well they gave me a couple of 8/500 co-codamol a couple of days, probably just so they can say they did something on paper, the fucking bastards. Was on the medical wing, but just locked in a pad and left to rot.)
Nearly DID end up rotting, looking back on it. That, aside, GBL/GHB is the WORST.
IMO opiate WD, or even benzo WD has nothing on what G can unleash in terms of sheer unmitigated hell born as flesh.
Genes really have serious effects how brains work on different drugs. And really you are not rarity, maybe 50% don't get serious WD's from it, other one get some bad that's its worse than opioids.
