The report said "in lieu of making a case against Gabby for domestic assault." The officers at the scene observed physical scratches or marks on Brian so it probably would've been charges to her, if anyone.^^bbm
I disagree that DV charges would have been against GP. A full read of the incident report beginning with why a witness contacted PD provides that the witness saw BL grabbing GP's face in an attempt to prevent her from entering the van after BL wanted her to take a walk by herself. BL also admitted to trying to lock her out of the van before she managed to crawl inside through an open window!
It was after the 2nd officer followed and apprehended the vehicle that he asked BL about visible scratches on BL's arm (which BL didn't notice). BL stated they were probably from GP when she was trying to grab the wheel. GP told Officer she was hitting BL trying to get his attention to stop, not to hurt him (i.e., stop for the police following the van with lights flashing).