Sadly, no..
There's a certificate extension that Apple only applies if you're in their special hardware vendor's club. I also have a Developer ID certificate and attempted to sign the .kext - no dice.
It's worth noting that recent Hackintosh installers provide the option to inject a fake CA into the system, allowing .kexts to be self-signed without globally disabling Gatekeeper.
There's a certificate extension that Apple only applies if you're in their special hardware vendor's club. I also have a Developer ID certificate and attempted to sign the .kext - no dice.
It's worth noting that recent Hackintosh installers provide the option to inject a fake CA into the system, allowing .kexts to be self-signed without globally disabling Gatekeeper.