You can sell software which has GPL components, but you still have to release the source code. That's the only problem here. DamonPS2 used code from PCSX2 and released binaries, but PCSX2's GPL licence says you can only release binaries using their code if you also release your source code.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
