It's an old, debunked argument. God is not a satisfactory explanation for everything that we don't understand any more than it was an explanation for lightning and viruses before we understood electricity and microorganisms.
What you’ve missed is that language is not reducible in the way material things are. So it’s not explainable in terms of mass-energy. This is why I say it’s a real problem for naturalism. The few naturalists smart enough to know they can’t escape this are the ones who realize they have no choice but to resort to the absurd claim that language and thought do not really exist.
And as for the “God of the Gaps” argument, if you think it hasn’t itself been debunked, you’re not up to date on the latest debates. John Lennox of Oxford has this to say about God of the gaps:
“That is as wrong-headed as thinking that an explanation of a Ford car in terms of Henry Ford as inventor and designer competes with an explanation in terms of mechanism and law. God is not a ‘God of the gaps’, he is God of the whole show.”
http://www.christianpost.com/news/the-god-particle-not-the-god-of-the-gaps-but-the-whole-show-80307/