A Gurdwara is not a person it is a temple and there are many of them, in the world. It is a sikh temple and the first ever one was built by Guru Nanak.
Guru Granth Sahib Ji started with the arrival of Guru Nanak Dev Ji. The Sikh Gurus contributed to the development of Guru Granth Sahib Ji along with the devotional hymns of many Saints who came from different socio-economic backgrounds which included both Muslims and Hindus Saints.
Sikhs pilgrimate at The Golden Temple in Amritsar, India, also known as the 'Harminder Sahib'.Extra:Near that place, there's also a place called Qadian which is quite holy for Ahmadi Muslims. There is a place there called Minartul Masih.