Impotency9533 Hi,
No, that won't happen due to their hardware not meeting the security requirements of GrapheneOS's standards.
For more details and indepth explaination please read:
https://grapheneos.org/faq#when-devices
Also, just a friendly brief side note, GrapheneOS is not a ROM. If you'd like to learn more about the reasoning behind that and time permits for you, check out:
https://akc3n.page/posts/grapheneos-is-not-a-rom/