See the review: http://wordpress.org/support/view/plugin-reviews/gtrans
Lots of bad things going on with this guy. Its even faking downloads so it remains on the most popular list.
Sending your concerns along with some detailed information to: plugins@wordpress.org may be the most efficient way bring attention to the issue.
Moderator
Jan Dembowski
(@jdembowski)
Forum Moderator and Brute Squad
Generally speaking if there is a problem with a hosted plugin please send the details to plugins AT wordpress.org.
Edit: DOH! ClaytonJames beat me to it by 11 solid minutes.
The plugin has been removed for violating our Plugin Repository guidelines.
Emailing us about such issues when they are found is the fastest way to get action to be taken.