No. He's reclaiming the term 'god'. Spinoza equated god with being or reality - all off it - not just gaps. He did not believe in a personal or interventionist god.
"God, that is, Nature..."
"God, that is, Nature..."
Here's a good quote, wherein he's criticizing people's conception of God as the 'first cause' -
"So they will not cease to ask for the causes of causes, until you take refuge in the will of God, that is, the asylum of ignorance."
The quote makes pretty clear that he is explicitly rejecting the "God of the gaps".