• Ancient computer and nvidia card here. Not sure what Gnome’s nightlight is ultimately based on, but you might try Redshift or f.lux which - I assume - do pretty much the same thing.

    I’ve used both and am currently using Redshift. f.lux stopped working for me a few years ago and I haven’t bothered trying to find out if that was a fluke and whether it will work again now. Redshift uses geolocation by default, but that can be turned off.