Can I also play on a PC with my Ps4 gta online acc? Or do I have to make a new acc
Unfortunately, that is no longer possible, at that time the "Transfer character" function was still available, but has been abolished.
No, you can't.
Unfortunately, it doesn't work like it used to. I think you just have to live with it. Or open your wallet and buy the game again for pc. Buy buy buy buy buy buy buy buy buy buy