Godzilla one shots, and if Garou tries to play the long game he loses horribly.
Godzilla's every attack is at LEAST (guides may have found a confirmed multiplier between SpaceGodzilla and Destroyah) 63.84-127.68 MegaFoe (He was 10.64, then got 6x stronger in base or more, then the red beam is lowballed 2x stronger). Garou is 1 Foe.
Garou's just >>>4.33 c at this point (a lot greater but unquantifiable+not done on the profile) Godzilla's casually tagging 34.59 c. Almost 8x faster.
Garou possesses exponential growth with copy mode+whatever monster growth he has left, Godzilla possesses INFINITE growth.
Using the nuclear punches and gamma ray burst would only make Godzilla stronger.
Garou copies the power and stats of the opponent he faces, so his wanked 4-A and MFTL+ speed "feats" later wouldn't even be a factor cause that's not what he'd get from copying Godzilla. His copies are also inferior to the original, shown on the graph
where Saitama's power isn't ever equaled by Garou.
Gravity fist from Blast does nothing, Ghidorah's graviton destroying Gravity Beams are superior by default and give Godzilla better durability negation+resistance than Garou has.
He could try to portal Godzilla but as proven by Blast and Saitama,
sufficiently powerful energies can just break out of the portals. Not on the profiles yet but Utsuno and Orochi also possess
space-time manipulation and dimensional abilities, to which Godzilla scales since his base form = Utsuno and > Orochi who could destroy a space-time barrier. So he could probably just blow it up anyway.
Garou also can't regenerate anymore as proven by him never healing the blood on his face and admitting Saitama's PUNCHES would kill him. Let alone the beam capable of killing creatures that can exist as a single CELL.
If anyone's gonna be stupid enough to take "hyperspace" literally....Godzilla resists supergravity (and absorbed SpaceGodzilla's energy so probably has it himself) which is > in terms of higher dimensional abilities.