Hard to say how it fares against those specific attacks but some of the vulnerabilities that will go out in the mid-2026 on the mainstream handsets are already patched: https://grapheneos.org/releases#2026021200

(it's not magic. All big vendors have these details, just choose to take their sweet time to patch them. GOS has partnered with a major OEM vendor who provides them with access)

Other than the specific patches above, there's a list of generic GOS features: https://grapheneos.org/features#exploit-protection

All in all you're probably much safer.