What do you mean by "free will"? Do you mean as defined by philosophers such as Dan Dennett?
"Dennett's stance on free will is compatibilism with an evolutionary twist – the view that, although in the strict physical sense our actions might be pre-determined, we can still be free in all the ways that matter, because of the abilities we evolved. Free will, seen this way, is about freedom to make decisions without duress (and so is a version of Kantian positive practical free will, i.e., Kantian autonomy), as opposed to an impossible and unnecessary freedom from causality itself. To clarify this distinction, he coins the term 'evitability' as the opposite of 'inevitability', defining it as the ability of an agent to anticipate likely consequences and act to avoid undesirable ones."
https://en.wikipedia.org/wiki/Freedom_Evolves#Free_will_and_altruism
It is my understanding that the modern philosophy of mind would have what we experience as having made conscious decisions as only a narrative constructed by the brain. In this context, what we believe is not under conscious control.
From
http://www.naturalism.org/metzinger.htm
The unsettling point about modern philosophy of mind and the cognitive neuroscience of will, already apparent even at this early stage, is that a final theory may contradict the way we have been subjectively experiencing ourselves for millennia. There will likely be a conflict between the scientific view of the acting self and the phenomenal narrative, the subjective story our brains tell us about what happens when we decide to act. (p. 127)
From a scientific, third-person perspective, our inner experience of strong autonomy may look increasingly like what it has been all along: an appearance only. (p. 129)
What do you mean by "God"? Are you referring to a "God" that allegedly walked and talked in a garden that has no evidence of having existed, poofed people and animals into existence, and later, in a manner contrary to the modern understanding of genetics, populated the planet with a tiny group of individuals and animals that survived a global flood in an unbuildable boat, a flood that killed the dinosaurs in a manner that only *appears* to be 65 million years ago, because the Earth is really only somehow 6000 years old, yet remains, by every objective measure to date indistinguishable from nothing?
Is this what you are suggesting as the source of what is described by the laws of physics?