It wasn't an article. It was just a post on (or 'at'?) some web forum...

As far as I know, it's just another grammar rule - 'be going to' can be used to express predictions.
For example, 'We're going to run out of fuel' doesn't mean 'we have a plan to spend all the fuel in the tank of our car' -
it just means we've just noticed the low level of fuel and we'd better find a petrol station.

Perhaps it even can be said that English doesn't have rules...
There is a section at the BBC Learning English web site named 'The English we speak'.
IMHO the quoted phrase explains everything.

I remember a theme about using a verb that follows another verb.
I mean for certain verbs the second verb should be either an infinitive or -ing form.
For example:
I denied reading ... (not 'I denied to read')
I offered to do ... (not 'offered doing')
I suggested doing... (not 'suggested to do')

I've asked my teacher (he was a native) whether it would be clear if I said 'suggested to go' or 'offered going'.
He answered it would be understandable but it would sound like a basic level of English...

ЗЫ. Народ, я тут в двух последних предложениях не слишком наплел с условно-сослагательными конструкциями?
Is it understandable? :)))