Deidle has released a golang library and library generator for Frappe and ERPNext APIs.
The ready to import library is at https://github.com/deidle/erpnextgo under GPLv3 license.
The generator for this can be found at https://github.com/deidle/frappe-doctype-to-go also under GPLv3 license.
We’re developing against it currently and changes are slowing down so we thought would be useful for the community. Comments, bug reports and PRs are welcome. The documentation is minimal but there are tests which should be working if you have access to a test system with system administrator role.