WPG2 Options G2 Paths can be found on the WPG2 Options Menu, via the WPG2 Tab which is located (Generally last) on the Wordpress Top Menu (Dashboard, Write, Manage .....)
Please Note this Screen Has Changed in 3.0.5
As part of the validation process, WPG2 queries Gallery2 for it's file and URL Location. The plugin needs these values to communicate to with Gallery2 and to generate the required navigation links.
If WPG2 cannot locate Gallery2 during the first validation check, you have two options to supply the various paths values (Please See Below)
If WPG2 paths are invalid, WPG2 will give you the option to supply a URL value to your Gallery2. To get his value, navigate to your Gallery2 and copy the URL in your browser location bar and paste this value into the Automatic Configuration of WPG2 Embedded Paths field and select Validate.
Should this step fail, which will happen under certain hosting environments then
NOTE:Proceed with caution when adjusting these values. Should the WPG2 automatic configuration fail, then you will need to supply either Gallery2 URL and/or the Gallery2 File Paths.
If WPG2 validation is failing with Gallery2 to WPG2 Relative Path Validate? - [Failure] and you did not deactivate the WPG2 plugin prior to upgrading from an older release then please deactivate the WPG2 plugin and reactivate it.. If you continue to have problems then the value will be the path from your Gallery2 ROOT directory back to your WPG2 plugin (usually would be something like the examples below). You can maintain this value in the WPG2 Paths tab..
../wordpress/wp-content/plugins/wpg2 ../wp-content/plugins/wpg2 ../blog/wp-content/plugins/wpg2