You can't really develop a kernel-mode driver nowadays without being an incredibly large OEM. Otherwise, you won't be accepted by any anti-cheat.
An anti-cheat app would probably be quite surprised to find it's running on Windows 95 anyway.
If anti-cheats actively whitelisted drivers playing competitive video games would be impossible for people using any rarer HW/utilities. Vulnerable drivers are generally blacklisted when found.
Getting your driver signed seems like a pain these days, yeah
So we should throw away the possibility entirely just because of a few videogames? That doesn't sound reasonable at all, considering most videogames don't have anti cheats and GPUs can be used for way more stuff than playing.