going and going to

[Giovanni]

What is the difference between I am going out tomorrow or I am going to go out tomorrow? When do you use going and when do you use going to? I think both can be used for future use, but I don't see that much of a difference.
Thanks for your help.

[Mister Micawber]

.
I am going to go out tomorrow indicates future intention/resolution.
I am going out tomorrow indicates near future 'inevitability'.

As you noticed, they are often used interchangeably; the differences are often more subtle than they seem in my definitions.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber