I hardly felt that ~20 lines of code is worth an entire blog post. So why are you able to read this as more than a tweet? The more I looked back at the potential approaches to solve this problem I could have taken, the more I realized understanding how to figure out the minimum viable code to complete a requirement was worth exploring. Especially when this snippet could be used in a LOT of common business processes.
There are multiple ways to generate bulk Gravity Forms entries which trigger Gravity Flow workflows. You may benefit from using a bash script looping Gravity Flow CLI commands OR a function hooked to gform_pre_submission that enables Gravity Forms Entry Importer from Gravity View to map hidden email fields into Gravity Flow user / assignee fields.