I'm sorry, but the phrase "God is Truth" is insipid. Truth is a statement that accurately describes reality. So you're saying that God is a statement that accurately describes reality. But that's true exactly like "'JennyP exists' is a statement that accurately describes reality." So JennyP is Truth. So JennyP is God.
Now, if God does in fact exist, then it would be accurate to say "God truly exists" or something like that. But of course that's redundant, and it certainly can't be used as an a priori axiom upon which the very existence of Truth itself must depend.
I wonder ... if God spoke to us all, in clear unmistakable words, and announced that His work here was done, and He was leaving this universe forever in order to take care of business elsewhere, wouldn't we still be able to determine things like right, wrong, and truth?
By what I said, and by what I imply: God is the Truth of all things. "Truth" is a name for God.
Saying one exists does not make one THE Truth. As you state with " But that's true exactly like "'JennyP exists' is a statement that accurately describes reality."
Your existance PROVES existance, but it does not make YOU existance. What God is is the origin of all things. God is the perfect form that Plato spoke of.
While your latter statements are also correct, they are not what I meant by my statement.