Gerard Depardieu -- Detained for Drunk Driving on Scooter

Gerard Depardieu wound up in a French police station today ... after cops say the actor was drunk driving around Paris on a scooter.

According to reports, Gerard -- who starred in "Green Card" back in the '90s -- fell off his scooter like a drunken idiot ... catching the attention of police, who took the 63-year-old into custody.

Gerard was reportedly held for questioning ... and later escorted back to his home. He'll eventually have to appear in court to handle the matter.