Both ACF and gravity forms have filters that will let you dynamically populate fields. For the GF side the best place to look for help will be the documentation for that plugin because most of the work will be done in filters for that plugin. We can help you get the values you need from ACF and if needed put values back into ACF, that’s the easy part from my perspective.
To answer your question, if you know what filters need need to be used, it should be relatively easy to accomplish.
https://www.gravityhelp.com/documentation/, I just looked at this but I don’t even know where to start.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
Helping others is a great way to earn karma, gain badges and help ACF development!