Lahore Grammar School (LGS) is a privileged private school system based in Lahore, Punjab, Pakistan, with branches spread throughout the country. The school was established in 1979 at its 55 Main Gulberg campus by  Nasreen Mahmud Kasuri. She is a Pakistani educationist and politician who has served as a member of the National Assembly of Pakistan and its CEO is Mrs. Syeda Nighat Ali. The school’s philosophy has been to combine collaborative learning, critical and logical thinking skills, and a diverse co-curricular program to help students become leaders.

Lahore Grammar School 55 Main Gulberg provides education to girls to A Level. It has extended its network to cater to the needs of the middle-income group in its Landmark Schools. LGS has branches in Islamabad, Karachi, Peshawar, Quetta, Multan, Gujranwala, Sialkot, Faisalabad, and Gujrat. It offers quality education to the low-income group through the Lahore Education Society School, entirely supported and funded by LGS.

LGS is affiliated with the Cambridge Board of International Examinations (CIE) for O & A Level education. Lahore Grammar School (LGS) has a thriving campus and community situated in the heart of Lahore. The school has seventeen Clubs and Societies, each catering to a different set of passions and interests.