Why Something Rather Than Nothing?

[Esquilax]

Premise 1. Intelligence is the ability to navigate a reality.
Premise 2. In order to navigate a reality, that reality must exist.
Premise 3. God is and always has been intelligent.
Conclusion: Therefore God has always existed in a reality.

What does it say about the nature of God?

I reject your ad hoc first premise, which was clearly formulated like this in order to reach the conclusion you already had in mind. You don't get to toy around with definitions so that words mean what you want them to; unintelligent creatures navigate reality just as easily as intelligent ones, and therefore your definition is useless.

Additionally, even taking your argument seriously from the start, premise three is entirely undemonstrated, and the conclusion you draw from it unearned. You might as well have just gone with: "Premise 3: I demand that god exists and is intelligent."