You may get a warning Yes/No box from blizzard about attempting to run a custom script and can lose items and gold. This is a one off setting that was added late in Beta. You dont need GS-E to trigger this. Lines like /script UIErrorsFrame:Clear() or /run UIErrorsFrame:Clear() or the /run SetSoundEFX 0 line will cause this popup. In GS-E these are now Global Options (Configurable from the Interface Options window to remove them from sneaking through in a sequence that is not understood. I am looking into how to prevent the Dialog as it was added when someone found a chat exploit using /console and /script lines.