I dunno if he's a fake or not. His takedown of that Senate Committee was an all time classic on the other hand.
...Except the whole thing was a complete piece of fake theatre by Galloway.
There was absolutey no need for him to attend the hearing: it's common - especially for foreign witnesses, who are under no legal compunction - to give written testimony, and that's what the committee were expecting. Galloway, however, couldn't turn down the opportunity for showboating in front of the cameras.
Politically, many of those on the committee actually agreed with much of what Galloway's said, which is why they were so annoyed at him attacking them. The final report asertained that Galloway "knowingly made false or misleading statements under oath", and provided evidence that he and his wife had indeed improperly received money after all. But of course all that's forgotten now in favour of Galloway's histrionics...