Gross Motor Function Measure (GMFM-66 & GMFM-88) User’s Manual, 2nd edition


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The Gross Motor Function Measure (GMFM) has become the best evaluative measure of motor function designed for quantifying change in the gross motor abilities of children with cerebral palsy.

The measure is very widely used internationally and is now the standard outcome assessment tool.

This second edition builds on the wide success of the first edition; new details of the  measure are presented, its short forms and how to use the updated software. It also  includes two abbreviated methods of estimating GMFM-66 scores using the GMFM-66-Item sets and the GMFM-66-Basal & Ceiling.


Physical therapists and other health professionals working with children, youth and adults with cerebral palsy;  clinical and health services researchers; any clinician who is assessing and describing current gross motor function and evaluating its change over time.

Gross Motor Function Classification System Video


Video shared with permission from CanChild.


The GMFM software can be purchased directly from CanChild. For further information, please visit their website.

Clinics in Developmental Medicine Series