Don’t know anything about Clonidine.

Gabapentin is often prescribed for depression. It can be taken with other antidepressants. I’ve heard it can cause severe weight gain via water weight and bloating.

People use gabapentin recreationally?

I don’t even take my full low dose during the day as I don’t like the way it makes me feel (though it’s a very effective drug for me).

No to stop drinking

What are you suggesting these medications be used for?

A recovering alcoholic can die from "not drinking" -- delirium tremens, the "shakes" that they get in the morning, are a physical manifestation of the transcriptional changes that have occurred in their brains as a result of being adapted to ethanol. The drugs mentioned all modulate neurotransmitters pharmacologically and are often part of the recovery process (the details are quite complex).

Baclofen, titrate up until you reach indifference to alcohol.