Should my child have a GMFM assessment?

If your child finds rolling, sitting, crawling, standing or walking harder than expected, the GMFM helps turn those everyday movements into a clear, trackable picture.

In short

The Gross Motor Function Measure (GMFM) is a clinician-administered structured assessment that looks at how well your child performs big-body movements — lying and rolling, sitting, crawling and kneeling, standing, and walking, running and jumping. It is most often used for children with cerebral palsy and similar motor conditions to map current ability and, crucially, to track progress over time. Whether your child should have one is a clinical decision your physiotherapist makes with you — it is a measure of movement skill, never a label or a one-off verdict.

What a GMFM actually involves

There is nothing painful or invasive about it. Your child is simply invited to try a series of everyday movements while a trained therapist observes and records what they can do:

• Five areas of movement — (A) lying and rolling, (B) sitting, (C) crawling and kneeling, (D) standing, and (E) walking, running and jumping.
• Real tasks, not tricks — getting from lying to sitting, holding a sit, pulling to stand, taking steps. The therapist scores how much of each task your child completes on their own.
• A play-based, gentle session — for younger children it often looks like guided play on a mat, with breaks as needed. Familiar toys and your presence help your child do their best.
• A repeatable baseline — because the same items are used each time, a later GMFM can be compared like-with-like, so genuine gains show up clearly.

When a GMFM is the right step

A GMFM is usually considered when there are concerns about a child's gross motor development, a known motor condition such as cerebral palsy, or a need to measure whether therapy and interventions are helping. It is one part of a fuller picture — your clinician combines it with developmental history, observation and other measures to decide what your child needs next and how to pace it.

The Pinnacle way

Developmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional., under the care of a qualified clinician — never from an online tool or a single number. Our therapists use validated, clinician-administered measures like the GMFM alongside our own AbilityScore® to track your child against their own baseline, so small, real motor gains become a visible line. With 700+ therapists across 70+ centres and 25 million+ therapy sessions, each re-measure flows directly into practical physiotherapy and motor-skills therapy you can continue at home.

Trusted sources

WHO ICD-11 framework for diseases of the nervous system and motor disorders; CDC and HealthyChildren (AAP) gross motor milestone guidance; NICE guidance on management of children with cerebral palsy; Cochrane reviews on physiotherapy interventions for motor function.

Next step — Want to know if a GMFM is right for your child? Book an AbilityScore assessment with a Pinnacle physiotherapist and get a clear, re-measurable motor plan.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.