[General] I'm good like that

[Dark_Fury]

Hello, could you please tell me what "I'm good like that" means? For example:

Without turning around, she said, 'Is there something I can help you with, Dr Edwards?'
'How did you know I was here?' he asked softly.
'I'm good like that.'
(A Mother for His Twins, Lucy Clark)

And I wonder whether it's different from "I'm good at that".

EDIT: Another example:
The running theme here is that Augustine has done wrong, and is unworthy of God's mercy, but God is going to give it to him anyway because God is good like that.

 

[GoesStation]

What I/he just did is an example of something we know how to do well.

 

[Charlie Bernstein]

Yes. She could also say:

- I'm good that way.
- I have that talent.
- It's a special ability I have.

Your Augustine example is fine as long as you know that it's informal. "Good like that" is conversational, not formal.