I use plugin plg_gacode-1.2.0.zip in Joomla 1.5.17. It works, but in Chrome it does not create e-commerce tracking code after submiting order (I look at code). Any clue why? In firefox it is ok. We will upgrade to newest version of joomla and virtuemart soon, but I am not sure, if it fix this problem...

Hello,
well, the e-commerce tracking uses JavaScript, so there might be some JS conflict.
Try debugging the problem and check if any JS error is reported.