Would love to hear more about the reasoning behind this. IRC might not be as flashy as Slack, but for my daily work and communication, it works fine (I use IRCCloud) even though I would love for IRCCloud to offer a bouncer so I can use my own client.
AFAIK, the only way Gitter "integrates" with Github is sending repository updates to the channel, something which Github has a webhook for doing with IRC as well.
