This descriptive-analytic study aimed to investigate the attitudes of both EFL students and teachers of cycle 2 (grade 5 to 10) in governmental schools toward online learning via Google Classroom and identify the challenges students and teachers face while implementing online learning. The sample selected for this study was 426 students and 294 teachers. The research instruments were two attitudinal questionnaires to gather attitudes and challenges of students and teachers. The questionnaires were administered at the beginning of the second semester in the academic year 2020/2021, after implementing Google classroom for learning and teaching in the first semester of the same academic year. The study's findings revealed that both students and teachers had shown an overall positive attitude toward online learning via Google Classroom; however, teachers showed a slightly higher mean than students, concluding that teachers are more satisfied than students. However, there was no statistically significant difference in attitudes towards Google Classroom between students and teachers. The study also reported no statistically significant difference in attitudes towards Google Classroom between males and females. Despite having positive attitudes toward online learning via Google Classroom, students and teachers have shared various challenges they faced while implementing it, such as technical issues, lack of training, language barrier, and lack of participation. In light of these findings, the researcher presented several recommendations for practice and further research.