The Commerce Society is a student elected society under the patronage of the Commerce teachers. It was inaugurated in 1992 by Mrs. Jayantha Ekanayake, when Rev. Sr. Mary Laetita was principal. The Society was affiliated to the All island Commerce Students Society and has the distinction of holding the 1st Commerce Day in Kandy. Other schools in Kandy were invited to participate.
Commerce Day is organized by the students of Grade 13 in the Commerce Stream, The main purposes of the Society is to inculcate the knowledge of business and economic activities in relation to Sri Lanka and the world, to better the academic and social experiences of all students and contribute to the development of both academic and extra-curricular activities.

The programe for the day is enhanced by inviting persons of distinction in the particular field to deliver a talk. In addition multi - media presentations, skits, songs, dramas and quiz programmes are included. At the Kandy District Commerce Day held in 1992, many items were selected from those staged at Good Shehperd Convent, Kandy Commerce Day. Mrs. Jayantha Ekanayake composed the theme song 'Vishwa Gam Piyasa' which is a regular feature at every Commerce Day.
After the retirement of Mrs. Jayantha Ekanayake, Mrs. Thusitha Senevirathne has very capably handled the Commerce Society, along with Mrs. Logi Nadarasa, Mrs. Geethanjali Wijetunga, Mrs. Chandrika Maiwathege, Mrs. Madara Ranatunga, Miss. Madushika Sugathaghana, and Mrs. Punidha Kanadendran. Students attend Commerce Day celebrations at other schools and take part in competitions.
The students became the champions in competitions held at St. Anthony's College in 2011 and 2012. The school unit of the Seylan Bank is managed by the students of the Commerce Society.
Down the years, many students have entered Universities in Sri Lanka and abroad, gained recognition in their fields of study and held high positions in government and private institutions.

The Year 1998, was a memorable one for the students of Good Shepherd Convent, Kandy. Mrs. Kusum Rajapakse and Mrs. Nirmalie Abeyasinghe laid the firm foundation for the Science Society enabling students to be part of the global village.
Science Day is held annually with the participation of the invited schools in Kandy. Two guest speakers are invited to speak on topics that would broaden the vision of our students and give them insight into the world of science and Technology. Mathematics is also a part of the Science Day.

Mathematic and Science Day competitions are held to promote the development of skills, and knowledge and help to bring out the talents and creativity of students. The students enjoy the benefits of taking part in competitions held in other schools and institutions. Students participate in the Australian National Quiz Competition annually and win awards. They also won the poster competitions and Software Competition organized by the Drug Prevention Unit of Girls' High School Kandy.
Students got the opportunity to compete in the Earth Science Olympiad Competition conducted by the Science Faculty of the University of Peradeniya and became winners at all-island level.
Students participated at the 5th International Earth Science Olympiad in Italy. Prasadi Dangolla won a gold medal.
Anne Edward was awarded a trophy in International Team Field Investigation.

The Science Society has been able to invite distinguished person to address the students at the versions Science and Mathematics Day celebrations 2010 :'Bone Fracture and Breast Cancer' Dr. C. S. Dunuwila Head Orthopaedic Department, Teaching Hospital, Peradeniya.
'Enjoying Mathematics' Dr. WB. Daundasekera Head, Department of Mathematics, University of Peradeniya
2011: At Science Day 'Aurora' Dr. Rajitha Abeysekara, Teaching Hospital, Peradeniya 'Nano Technology' Dr. G. H. S. Maithripala Department of Mechanical Engineering.
2012 : At 'Znricz' - 'Science and Youth' Dr. Nawoz Jiffrey - Gynaecologist and Obsterician. Dr. Jayalath Edirisinghe Senior Lecturer, Civil Engineering, University of Peradeniya
2013 : At 'Navitaz''Dengue' - Dr. Welegedera Medical Registrar, University of Peradeniya. 'Non-Communicable Diseases' - Dr. Judith Kurukularchchi, University of Peradeniya.
It is imperative that our students keep abreast with the development and progress of the world at large and the Science Society is undoubtedly the place eminently suited to do so. The Science teachers Mrs. Suneetha Perera, Mrs. Saumya Perera, Mrs. Nalini Peramuna, Mrs. Shanthi Ekanayake, Mrs. Padmalatha Sasendran, Mr. K. Kirupalamoorthy and Mr. Collin have worked with commitment to enable all students to gain both knowledge and skills and move ahead with confidence.