The gorilla is 4x heavier with dramatically superior strength — the lone wolf has no chance.
A 400-pound gorilla against a 100-pound wolf is a complete mismatch in a 1v1 scenario. The gorilla's grip strength alone could crush the wolf's skull. Its arms can deliver devastating strikes that would ragdoll the wolf.
The wolf's only advantages — speed and endurance — are pack-hunting traits that don't translate to solo combat. Its 400 PSI bite, while respectable for its size, isn't enough to seriously threaten a gorilla's dense musculature.
4:1 weight advantage, dramatically superior strength, and dexterous hands that could grab and slam the wolf. The gorilla's intelligence far exceeds the wolf's in a solo combat scenario.
The wolf is faster and more agile with a respectable bite. But alone, it has no offensive tools that threaten something four times its weight with a primate's grip strength.
The gorilla wins overwhelmingly. A single wolf is simply too small and too weak to compete with a silverback's size and strength advantage.
Silverback Gorilla also fights
Gray Wolf also fights