That's exactly what benzodiazepines are for, but only for short-term taper protocols as the dependence/withdrawal profile over the long term is worse than alcohol. Medium-term can be covered by gabapentin.
I know an alcoholic who was also addicted to gabapentin. It didn't reduce his alcoholism, and even when he tried to stop drinking, he would get stoned on the gabapentin (and was largely unaware of his diminished state)