So far as I know Gambas 3.0 is not yet available in a downloadable archive. But it is in a Subversion repository.
First thing go to
http://gambas.sourceforge.net/ and look at the
Download section. It explains how to get the various version of Gambas including 3.0.
Basically: first make sure you have
Subversion installed on your machine. Then open a Linux terminal and run the command:
svn checkout https://gambas.svn.sourceforge.net/svnroot/gambas/gambas/trunk/
You should then end up with a directory called
trunk. In there you will find the source code to Gambas 3.0 which you can compile in the normal way.
I have not used Gambas 3.0 very much. But Gambas 2.0 was pretty stable when it was being developed. It should be fine for personal use. I would not use it for a production application, at least not yet. Also you should be able to have Gambas 1.0, 2.0 and 3.0 all installed alongside each other and for there to be no conflicts. At least that's the theory.
