Will Ivy League schools tolerate low GPA?

Will you be automatically rejected because of your GPA? No, of course not. Applications are considered holistically. Your GPA is just one part of it, and you have a nice upward trend to go with it.

On a side note, you read where that applying to 4 Ivies is too much? Can you afford to apply to all 4? Do you have a safety school you would be happy attending? If yes to all, then by all means go ahead. Just make sure that the other 4 schools aren’t reaches and you have a >95% chance of getting accepted to them.

Don’t stress too much about the Ivies. You can be successful at any school you go to, if you have the drive.

Goodluck!