@brownrose78
you can not install a gpu in this laptop but you can attach a GPU externally with this laptop using a PCI X1 to X16 Riser.
You will need the following:
Power supply
PCI X1 to X16 Riser
GPU
Riser is also available on daraz, aliexpress and olx
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In core 2 duo you can install any GPU it could be something like Nvidia 740 or above but first check how much ram your desktop can accept because you will need atleast 8GB. If it can take 8gb than you may put even more powerful gpu like 750, 780 etc.
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I've never downloaded games for PlayStation but I can tell you that from piratebay you can download and burn them by any software.
I used to download PS games and run them by Emulator on pc.