I will give it a try then. That's exactly what Dortania's guide instructs when installing MacOS 13 on Skylake - spoofing the Skylake GPU to a Kabylake GPU.The EFI folder prepared by OCLP obeys all the principals of Open Core (it is an Open Core EFI). After OCLP prepares an EFI, you can modify it in whatever way you want, as long as your mods obey Open Core principals. After you make your mods (e.g., adding WhateverGreen (WEG) to OC/Kexts and adding WEG to config.plist > Kernel > Add), you should run Open Core's ocvalidate Utility to verify your config.plist mods. Note that just because you can modify the EFI and ocvalidate confirms a valid config.plist, that doesn't guarantee that your mods will work for your rig.
Short answer - if adding WhateverGreen and spoofing HD 550 is correct for your rig, then the answer is 'yes.'
UPDATE: Tried and the computer stopped booting.
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