A taper schedule that works for one person will rarely work for another person. I mean you can have an avg guideline to aim for but most of the time you will find its either too slow or too fast for your individual biology.
And lots of factors like diet, metabolism, fat composition, and sleep can play a role too.
You didn't mention what dose of sub you're on so I won't address that right now, but with sub if you're on a higher dose (anything above 4mg) most of the time you can start with a 50% drop. Then you will slowly have to change it as you get lower to like a 25% drop, 10% drop, and its best to slow it down towards the end. I'd imagine thats how it goes for most drugs.
With the gaba what I'd try doing it dropping it to around 2000mg first. Wait a few days and see how you feel. If you didn't feel anything, try dropping big again but maybe to 1600mg this time. The idea is to drop as much as you can w/out feeling to crappy. And if you overdo it, just compensate by taking a bit more.
But that initial drop you can usually be fairly heavy with. From 1600mg I'd aim at doing 50mg every other day. But again judge your body. Once you get down to around 500mg you may have to slow it, you may not. Your body will always tell you that though. But then you can aim for maybe 25mg drops every other day. Again I'm not giving you an exact schedule because it would be useless at the end.
Eventually once you get down to around 200-300mg I suggest taking it a lot slower. Maybe 10mg every other day, maybe everyday you'll know once you get there.
The most important part about tapering though is to listen to your body. If you're too anxious, to shakey, tired, feeling sick, SLOW IT DOWN. Never rush tapering.
But the analogy I use with getting off drugs is like landing a plane. Come in steep at first, and once you get to the end you want to go real shallow. Even once you stop the drug completely (when the wheels hit the ground) you may need to redose again a few days later if its too rough for you. This is like the part when the planes wheels are bouncing up and down off the pavement. Eventually though you will stablize, and be able to not take anything. Suboxone is really a great opiate to taper off of though. Luckily I had very minimal wds but I had to get down to .25mg and I stayed there for 18 days. Thats another important thing is when you get low with either the sub or gaba, stop focusing on making more drops. Like if you're at .25mg sub you really shouldn't have to go much lower. If you're down to 50mg gaba again you don't really need to focus on being lower. What you should focus on though is just staying at that dose at the very end for a week or 2. Your body will be making its last most significant adjustments at that time.
And this should go w/out saying but exercise, sleep, and a good diet really do help a shitton when it comes to tapering off drugs. Theres also tons of OTC things you can load up on to help make it easier. B vitamins, 5 htp, herbs for sleep (passion flower or valerian root) diphendyramine sleeping pills for sleep, benadryl for your stomach (more so for the sub tapering) and lots of vitamin c. What dose of sub are you on are you trying to taper off both at once?
