I have been managing my personal finances in GnuCash for several years. Now I want to switch to some cloud service which supports collaboration, so I'm looking for a way to transit my data from GnuCash to that (yet unknown) service.
So I need either direct support of GnuCash native format or exported csvs (which is unlikely), or a clean description of the format which the service can import.
I will be grateful for any suggestions of such cloud services. Self-hosted open-source software is an option too.