First let's see what bottlenecking really is.
BOTTLENECKS always exist, because of software optimization you can never get 100% out of your card.
But of course some parts bottleneck much more than others.
In general, the G2020 is an old CPU, low speeds, old architecture and only 2 cores. For modern gaming it's going to struggle
but the 1050 is still a nice upgrade. While you won't even get close to the max, you will get a much better gaming experience
And NO, you can't OC that cpu
it's a 3rd gen cpu and only i5s and i7s which feature turbo boost can overclock, and only if you have a Z77 board