Try
www.gyroplanes.org
I had a quick look and they have a good FAQ section. One question which might be relevant is the:
Do current Private Pilots Licence holders get dispensation?
"For those who already hold a valid PPL (A) or PPL (H) - aeroplanes and helicopters respectively - dispensation is granted from all written examinations except Aircraft Technical. They wiill also be expected to achieve at least 20 logged hours of flight training with a Gyroplane instructor. "
and
"There is one fundamental certainty in flying Gyroplanes - regardless of your previous flying experience, you must get yourself properly trained. If you attempt to teach yourself, YOU WILL become a CRASH!!! statistic - so be warned & be sensible."
Look like a lot of [dangerous] fun !
Good luck
EA