Gear drive unit comprising a plug-in electronics module

Gear drive unit (10) with an electronic plug-in module (44), in particular for adjusting movable parts in a motor vehicle, with a an armature shaft (18) having electric motor (12) and a lower housing shell (14) and an upper housing shell (16) radially to the armature shaft (18) at a separating plane (32) are matable and the electric motor (12) enclose, wherein on the lower housing shell (14) an electronic interface (42) for receiving an electronic plug-in module is arranged (44) and the electronic interface (42) a sealing plane (54) between an outer side (40) of the lower housing shell (14) and the electronic plug-in module (44) comprises at least approximately is arranged parallel to the separating plane (34).