VectorLinux has Gambas 1.0.19 and 1.9.49 packages in the 5.8 repository, though slightly earlier versions are available for 5.1. You can install them by using slapt-get or gslapt. I'm sort of the resident Gambas maintainer over there, so if you really want to build your own (like maybe a fresh svn version), let me know and I'll tell you how I do it to make the packages. BTW, VL includes a Gambas 1.0.x runtime by default since 5.1, as several of our own utilities are "made in Gambas".
EDIT: To be more precise, you need to enable the extra repo for 1.0.18, the testing repo for 1.0.19 (though this should move to extra tomorrow) and the unstable repo for 1.9.49. It is also a good idea to enable the patches repo, which is where updates of the base distro go. This should pull all the necessary dependencies when you install Gambas, though there are many optional deps depending on what you want to do (postgresql, sqlite, mysql, etc). You will find most of them on the repo too, except for corba and firebird, which are not supported by our Gambas builds.
