Danny, I don't know much about this except for what I've read here on the forums. I've never taken it. When you say you're splitting it do you mean that you're prescribed 600mg tabs and taking 300mg twice a day? Or, are you taking the capsules?

You could run a search here for past posts too e.g. either Neurontin or Gabapentin taper or withdrawal

There are many recommendations online to treat it like a benzodiazepine taper. You've probably seen that already.

Half-life is only 5 to 7 hrs.

Personally, if I was doing this I'd do it very, very slowly and with supervision of your doctor.