A GT4 tranny won't bolt to the 1AZ/2AZ engines. For a bolt-on application, the RAV4.2 manual transmission is your best option.
EDIT 2023:
The transmission that goes with S series engines don't have the same bolt-pattern... but it will bolt to an AZ series engine using less bolts.
EDIT 2023:
The transmission that goes with S series engines don't have the same bolt-pattern... but it will bolt to an AZ series engine using less bolts.