Gish galloping is talking over the person you're arguing with to tire them out and / or interrupt them
Commenting with long text walls asking someone to refute this or that or respond to a series of questions is usually the online equivalent of that
You ever see those comment chains with vеgаns constantly responding to someone until the person they're responding to gives up, that can be considered Gish-galloping
Obviously with online comments you can't talk while another person is talking