Is "going to get you" means "going to give you"? [closed]
"Must gonna" is not grammatical in any standard variety of English that I've ever met, though I'm quite ready to believe that there are dialects where people say it.
In that context I would interpret "get you" as "let you get". It's not a standard way of expressing it.
"It's not going to get you any far" is also not any variety of English that I recognise. I would assume that it is a mistake for "it's not going to get you very far", which is idiomatic, and means "It won't help you much".