i have an iphone 6 plus and an ipad pro. all of a sudden junk mail is coming into the inbox. junk mail needs to stay in gmail junk box.

Hi zorro246,

Thanks for reaching out here in the Apple Support Communities. We see that your Gmail junk mail is no longer going to the Junk mailbox, and we're glad to help.

Since this is happening on two separate devices, we recommend checking the Gmail webmail site to see if there are any settings in your account that need to be updated to manage junk mail .

If this is happening with other accounts as well, check out this article for steps to take to filter junk mail:

Identify and filter junk mail in iCloud - Apple Support

Take Care.