Google doesn't provide an API for Google Keep, so the integration is impossible at this point. See more here https://issuetracker.google.com/issues/36760910 and here https://secure.avaaz.org/en/community_petitions/Google_Create_a_Google_Keep_API/?aJiwBpb&newuser=1

Google Keep

This would be handy if possible! My wife likes to use it for simple checklists and whatnot and shares them with me. But I'm not a fan of managing tasks in Google Keep (gets too busy for my liking). If I could take her checklist notes and turn it into a task w/subtasks in todoist that would be phenomenal!

I feel you on this one. I use Todoist with Trello and G Suite Calendar. My wife uses her phone with Google keep checklist. Syncing cards to task or subtask would be great.