Standard bike grease should not be used on cables as already said. A light oil is suitable here.
If a cable is sticking I would just replace the cable and outer as you have to disassemble anyway to lube. My view on cable is run full length outers if you can bu if you can’t use stainless steel wires like Transfils that are cheap and chearful and replace as often as needed. They should last a decent length of time. If riden in sloppy wet conditions all the time then they will not last as long but transfil gear cable set would cost any customer here about £6 or £7 depending on how much outer is needed and how many ferrules are needed. So it it will never break the bank.
Lithium grease should not be used everywhere.
Bearings/moving parts use a grease with my favourite being Rock N roll Super web.
Anti size should be used in static metal to metal parts e.g. press fit headset cup, BB threads. Manufacturers recomend (mostly) that non grease or anti zize should be used of BB axle splines (there may be some expections).
WD40 has no place on a bike anywhere, it is hopeless. If I wan to free a siezed part plus gas is the pentrating fluid of choice.
I would not even let GT85 anywhere near a bike either.