Okay, I contact the support. If you have problems, ask for Bug 60350, it's the rewriting filter "Rewrite Citrix Embed URL with Object Tag". If you got the file, add it and make a policy trace when you try to open an application in the citrix gateway. Maybe you need to change the filter, so search "appembed.aspx" and replace the content with the text after "?" to "=".
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