Do you know of a mu user meta plugin for multisite?

I am trying to use Gravity Forms registration for a custom sign-up page with extended user meta fields.

I am struggling here. In the past, I have successfully used Cimy Extended User Fields but it will not work with Gravity Forms because it does not write to the user meta table. Or at least I haven't figured out how to do it.

I've checked out a couple of other premium plugins but have not seen how they are adding the fields at the network level.

Can you recommend a user meta plugin for extended custom user fields that can be used for the network so that all sites will have the required fields and that writes to the user meta table so that it will work with Gravity Forms registration?