"Gotta" is a shortened version of the phrase "got to," which means "must." Normally, you would hear "have to" instead, but "got to" is often used colloquially.

It's a short form of "got to" or "has/have got to," meaning "must." For example, "I've gotta' go home" (meaning "I must go home") or "You gotta' problem with that?" (meaning, "Have you got a problem with that?"). While it's normal to use "gotta'" in speech, it should never be written unless you are transcribing dialogue.

Gotta is short for got-to

gotta mean got to (do meaning must) or short form got to,have/has to. got it.

sorry dear! my English is not very well but i'm trying to English so my little mistakes forgive