Gross Motor Function Classification System

Understanding the GMFCS Classification and Why It Matters

The Gross Motor Function Classification System (GMFCS) is a widely used, evidence-based framework for classifying the gross motor function of children and youth with cerebral palsy.¹ The GMFCS classification organizes movement into five distinct levels, helping clinicians, educators, and families communicate clearly when discussing functional gross motor abilities, goals, and support needs.²

Developed to support clinical decision-making and shared understanding, the GMFCS has strong reliability, validity, and stability. Today, it is the international standard for assessing functional mobility in the pediatric cerebral palsy population.³

Rather than focusing on what a child can do under ideal conditions, The GMFCS focuses on the current daily function of skills such as sitting, transfers, and mobility.² This practical focus helps guide meaningful intervention and equipment decisions.

It utilizes five age ranges: <2 years, 2-4 years, 4-6 years, 6-12 years, and 12-18 years.

The 12-18 age band reflects the impact of the World Health Organization’s International Classification of Function, Disability, and Health (ICF) framework, highlighting the concepts of environmental and personal factors that may affect the child’s abilities.

GMFCS Levels Explained

(for the 6–12-year age range)

Understanding the GMFCS levels can help caregivers and professionals better support a child’s mobility and participation. Below is a simplified overview of GMFCS descriptors for children ages 6–12.

• GMFCS Level I:

  Children at GMFCS level 1 generally walk without limitations. They may have limited balance, coordination, and speed for advanced gross motor skills like running or jumping.

• GMFCS Level II:

  Children at GMFCS level 2 walk on level surfaces without difficulty. They may need a railing to climb stairs and have some difficulty with uneven surfaces, long distances, and crowds. They also likely struggle with running and jumping.

• GMFCS Level III:

  Children at GMFCS level 3 generally walk using a hand-held mobility device. For longer distances or community settings like school, they may use manual wheelchairs or powered mobility.

• GMFCS Level IV:

  Children at GMFCS level 4 use wheeled mobility devices in most settings. Some may complete some self-mobility with supported stepping device (such as a Pacer) at home or for short distances.

• GMFCS Level V:

  Children at GMFCS level 5 primarily use wheeled mobility and require postural support to maintain an upright position.

For accurate classification, clinicians should refer to the full descriptions of the criteria for each age group which provides detailed distinctions between each level.

GMFCS Family Report Questionnaire

The GMFCS Family Report Questionnaire was developed to allow parents to provide critical input into the classification of their child’s motor abilities. It is available for children from 2-4 years of age, 4-6 years of age, 6-12 years of age, and 12-18 years of age.¹

Including family perspectives helps ensure that the assigned GMFCS level reflects real-world function, not just clinical observation.

GMFCS Illustrations

Visual GMFCS descriptors and illustrations are available for key age groups, including the 6-12 and 12-18 years. These resources can make the GMFCS classification more accessible, helping families and interdisciplinary teams better understand how each level relates to everyday movement.

Clinical Significance of GMFCS Levels in Equipment Selection and Care Planning

The gross motor function classification system provides a consistent framework for understanding motor function in children with cerebral palsy throughout childhood and adolescence. Because GMFCS levels remain relatively stable, they can guide long-term planning for therapy, education, and adaptive equipment. It can also support clinicians with clear communication with parents and families.

When clinicians and families understand a child’s GMFCS level, they can make more informed decisions about supports that enhance participation. This may include functional sitting for improved posture, tools that support safe and efficient transfers, and devices that promote mobility skills.

Thoughtfully selected adaptive equipment can help children engage more fully in daily routines at home, at school, and in their communities. These supports contribute to improved function and a higher quality of life.

References:

1. Palisano R, Rosenbaum P, Bartlett D, Livingston M. Gross Motor Function Classification System – Expanded & Revised (GMFCS – E&R). CanChild Centre for Childhood Disability Research, McMaster University; 2007. Accessed March 7, 2026. https://canchild.ca/wp-content/uploads/2025/03/GMFCS-ER_English-ACCESS.pdf 
2. Palisano RJ, Rosenbaum P, Bartlett D, Livingston MH. Content validity of the expanded and revised Gross motor Function Classification System. Dev Med Child Neurol. 2008; 50(10), 744-750. https://doi.org/10.1111/j.1469-8749.2008.03089.x
3. Piscitelli D, Ferrarello F, Ugolini A, Verola S, Pellicciari L. Measurement properties of the Gross Motor Function Classification System, Gross Motor Function Classification System-Expanded & Revised, Manual Ability Classification System, and Communication Function Classification System in cerebral palsy: a systematic review with meta-analysis. Dev Med Child Neurol. 2021; 63(11), 1251-1261. https://doi.org/10.1111/dmcn.14910