GET OUTTA HERE! is also used when someone tells you something that sounds absolutely unbelievable to you, or like absolute bullshit.
A: I just won $1 million in the lottery!
B: Get outta here!

I don't know how to say it in Russian :(

Отвали! Свали! Вали отсюда! - невежливые выражения.
Исчезни! Скройся с глаз!

Uly, in Russian your example would sound like:
Да быть такого не может! / Не сочиняй! / Пиздишь ты всё! / Ну придумал же такое! / С трудом верится! ......

Your versions are good, too. They all pretty much imply what I wrote above

Cool! You should add yours too

there are way too many phrases in Russian to express the second meaning of the original. Your version is enough.

👍🏼

Ну ещё и типа «да лааадно!’ - удивление и недоверие! Сейчас популярно