The ACEI Global Guidelines Assessment (GGA) was developed to provide an international assessment tool that can be used by early childhood educators to develop, assess, and improve program quality worldwide. This pilot study was conducted in four countries to investigate the psychometric properties of the GGA within and across different countries. A total of 168 programs and 336 early care and education professionals participated in this study from communities in the People's Republic of China, Guatemala, Taiwan, and the United States. The results show strong internal consistency for each subscale and the total GGA as well as moderate interrater consistency for the five subscales. A comparison of item ratings and the qualitative evidence suggests moderately acceptable congruence between the ratings and evidence to support the ratings. Patterns of program practices were identified within and across the participating sties and countries that reflected both unique and common practices. These results suggest that the GGA has potential as a useful and effective tool both for understanding early childhood program quality within and across countries and as a means of helping practitioners to establish and/or improve the quality of their services.