Gait abnormality: Introduction. Gait abnormality: Where a person has an abnormality of the usual walking gait. See detailed information below for a list of 56 causes of Gait abnormality, including diseases and drug side effect causes.» Review Causes of Gait abnormality: Causes.auses of Similar Symptoms to Gait abnormality. Research the causes of these symptoms that are similar to, or related to, the symptom Gait abnormality: 1  Difficulty walking (88 causes). 2  Leg symptoms (2751 causes). 3  Gait symptoms.