I suggest you read the following documents:

• An OpenOffice document made by Sergio Hernandez. It will help to get started with the development environment, and will explain you how to make your first program.
  
  Download Getting Started with GAMBAS.odt (Last updated: 06-27-2007)

• The Important Notes.

• The Installation Page.

Then you can:

• Browse the web site.

• Subscribe to the mailing lists or some forums.

• Browse the Wiki Encyclopaedia.

• If you are an old VB user, please read the Differences From Visual Basic page.

• There are a lot of examples provided with the development environment. Read them!

Enjoy Gambas!