Peace be upon you
I gotta + (verb)0
'I gotta' is grammatically incorrect. It is more of a spoken form. If you want to say this with proper grammar, the equivalent would be, 'I have got to' or 'I've got to'. In the spoken form, 'got to' is shortened to 'gotta' and the word 'have' is dropped
By adding the word 'have' you can change what you are saying to express something that needs to be done in the near future.