If that is an objective description of an objective reality that is independent of nature (as it seems that mathematics is) then yes. It might be a persuasive argument alone but it is juts one among thousands.
It is not the truth of that equation that makes God apparent. It is the rationality contained within it. The great scientific revolution occurred because Christians thought a rational God would create a rational universe and set out to decode the rationality in it if it existed. They found a universe full of rationality that the universe alone had no explanation for.
The same way the scientists in the movie contact said if they heard a pattern (rationality) in radio signals from space they knew that rational and intelligent creatures out there produced it. However in the case of mathematics no mere creature could make it exist nor could nature. We can perceive it, we can decode it, we can describe it. We cannot make it exist. BTW that is another line of evidence. I have heard many specialists say the chances that a mind would evolve anywhere in the universe capable of comprehending the rationality in the universe by chance is basically zero. Said as only Lewis could:
One absolutely central inconsistency ruins [the naturalistic worldview].... The whole picture professes to depend on inferences from observed facts. Unless inference is valid, the whole picture disappears.... unless Reason is an absolute--all is in ruins. Yet those who ask me to believe this world picture also ask me to believe that Reason is simply the unforeseen and unintended by-product of mindless matter at one stage of its endless and aimless becoming. Here is flat contradiction. They ask me at the same moment to accept a conclusion and to discredit the only testimony on which that conclusion can be based.
—C. S. Lewis, "Is Theology Poetry?",
The Weight of Glory and Other Addresses
Because it is like trying to catch a greased weasel, who is on fire, and phases out of reality every other nanosecond. You never know what might be necessary.
BTW you have not given my any alternate source for the objective existence of morality, mathematics, or rationality yet? You keep denying the only possible source I have ever heard of but not substituting a new one. Do you like a vacuum as much as space hates them?