Hi! I am the developer and maintainer of Mundus.
I would *love* to see it included in the official Debian repositories, and i really thank you for taking care of this! But for this to happen you would first need update the Gambas3 packages, as they are pretty old and not supported. Although it might build just fine as it is now, there might be unexpected behavior or bugs.
This has been a long discussed issue in the Gambas community, and we researched a lot of options to get an updated set of packages. Unfortunately, it has been 8 months since the last update [0].
There are a lot of members in the community willing to contribute a bit of their time to help and get this done. Debian users of Gambas exceed others, but they are left alone by needing to compile the whole Gambas stack on each release.
If you need any help or information please don't hesitate to contact me directly.
Thanks again!