You should give more information.

I often see posts about GPA at other forums. Often physics students lamenting their 3.7 GPA is too low for a PhD position at a top program. I don't know what a GPA of 1 truly means.

You don't mention what field you are in. Have you really found the problem(s) you had earlier and do you have a good solution? You may need to convince people that you have. And if nothing has changed, why will your marks change?

Then again, if you really were in a bad spot, and are not out of it, your grades should definitely get a big improvement. Grades can be very sensitive to the mental health of the student.

There's many people that horribly failed at a low level, then succeeded splendidly at a higher level. I include myself in that (though I haven't graduated yet). Besides having psychological issues, you may be a late bloomer. There is a reason you are going back after failing. That's almost certainly a good decision and says something about you.