Yes, this PC can run CS:GO if it has enough resources and a suitable setup.
He should be able to run CSGO on his PC with the given specs.
Does he lack a graphics card, then it could cause issues running CS:GO
It will but not very well at all...
Alright, I understand. Thank you.
It will have trouble maintaining a steady 30 frames per second. So no.
Run it at 4:3 resolution, avoid stretching from black bars. It should maintain around 30 frames per second.