Introduction: Dietary treatment of GSD is variable according to type and severity. There are few reports examining growth in GSD. Aim: A cross-sectional audit reviewing growth in children with GSD. Methods/Subjects: 18 children (10 boys) were studied. GSD Ia n=5; GSDI b, n=4; GSD III, n=5; GSD VI, n=1; GSD IX, n=3). Median weight/height z scores were calculated. Results: In GSD Ia (median age 8.3y, 4 Asian, 1 Caucasian), on 1.5 g/kg/ dose uncooked cornstarch (UCCS), normal diet and overnight tube feeds (CNTF), median height/weight z score was −1.63/-0.24. In GSD Ib (median age 7.2y; 4 Asian) on 0.7 g/kg/dose UCCS (n=2), milk-free diets (n=2) and CNTF, median height/weight z score was −2.04/0.68. In GSD III (median age 9.1y; 1 Arabic, 4 Caucasian) on 1.9 g/kg/dose UCCS, normal diets and CNTF (n=3) median height/weight z score was −0.5/-0.25. In GSD VI (age 6.9y; Asian) on 1.2 g/kg/dose UCCS only, height/ weight z score was −3.31/-2.26. In GSD IX (median age 8.7y, 3 Caucasian) one dose of UCCS pre-bed only, median height/weight z score was −2.09/-0.52. Conclusion: Suboptimal growth occurred in all GSD irrespective of dietary treatment. The impact on growth of metabolic control, infections, impaired exercise tolerance need investigation by collaborative trials.