The GPU is gonna highly reduce your fps even though csgo is totally CPU intensive.
Youll manage to barely get 60 fps on lowest settings and a low res.
If u get anything half-decent ( even a gt1030 ) you'll manage to get well over 200 fps with that CPU and low settings.
If you're looking for a cheap GPU, a used rx570-470 is the best bang for your buck you can get.
imho it's hard to say considering the specfs, your gpu is worse than the gpu which I had ~12 years ago, then again cpu is slightly better than the one which i'm using currently (6yo setup)... you should be somewhat over 100 (not sure how much) but it's hard to say..
That cpu can give up to 300 max fps but that gpu will lower it to 40-50 fps, especially if there is a smoke in front of you.
So probly your fps will hover around 150-200 but it will drop a lot depending on the situation because of the gpu. People say that gpu doesnt matter in cs go, but it actually affects quite a lot.