First of all, let me start by saying that I normally wouldn't complain like this, but after a month of waiting, not being able to support my customers, I'm frustrated and don't want anyone else end up in this situation.
At the moment, there doesn't seem to be a way of resetting 2FA (more specifically Google Authenticator) for https://portal.checkpoint.com.
This means that If you loose your 2FA (in my case, my phone went belly up without prior warning) you're out of luck.
So until further notice I'd stay away of using Google Auth as 2FA for portal.checkpoint.com.
Can't remember if SMS was an option, but if so I'd stick with that for now...