And judging by their hompage they mean mph. not kph.
"Inventor and Builder of the GPLIMOtm Michael Pettipas and holder of over 14 international patents and patents pending, stands beside the World's Fastest Street legal GPLimousine at the Famed Bonneville Salt Flats August 15th 2005. Inaugural test run readies the GPLIMO for the 300 mph goal and capturing the record from the Bugatti Veyron's 253 mph
GP and GPLIMOS is a trademark of Michael Pettipas & GLT INTERNATIONAL, AUTOMOTIVE MANUFACTURER
gltinternational@telus.net (c) & TM No reproduction of any means without prior written permission"
And GP Limos is out of Canada. I don't know the street legal laws in Canada but I doubt it'd make it through the states.