Hi @Raphux!
In the meantime until @nitroalex would reply, perhaps you would be interested in the following.
We have a custom Docker-based setup for a quick build of the GnuPG with the requested version. One can as well run it inside the container, and take logs (current setup’s default). The link is: https://github.com/Nitrokey/gpg-docker. The documentation might lack details at current state though - if you would have any questions, please let me know.
Additionally, GnuPG tests could be easily automatized through another project - https://github.com/Nitrokey/nitrokey-test-suite. I have not tested inter-operation between these two unfortunately - hopefully will do so in the future.