saksham_1 :
Don't worry I also have g2020 and it can handle modern titles pretty well.However 2GB ram is very very low mine has 8gb stick with a 2gb stick so I serious think you should upgrade your ram.As for Graphics card a rx550 or rx560 should do the job.
No not at all.
The g2020 scores at passmark benchmark 2769 that is way to low to play games, at GTA 5 you notice some serious stutter and low FPS.
Also there will be a HUGE bottleneck, mostly the GPU will be only 20% used and the CPU at 100% all the time.
Change that CPU and that RAM as fast as possible.
The RX550 is not worth the money even a GTX 650 TI is faster than this newer RX 550.
BUT the RX560 is pretty fast but its expensive and we still dont know the OP budget.