Quote Originally Posted by notoriousaudio View Post
Warning GC is set to use SANDBOX. Order will be processed but NOT charged.



i get this error in my admin control box when i click to install Google checkout!

how can i fix this please help i did searching but didn't find much problems like mine
This is not an error, just a warning, and is normal, since you have Sandbox selected as your Mode of Operation.

In your Admin -> Modules -> Payment select Google Checkout -> Edit. Change the "Select Mode of Operation" from Sandbox to Production.