Gurdwara Sri Gau Ghat Sahib, also known as Gurdwara Pehla Bara, was Bhai Jaita Mal's house. This Gurdwara is situated in Alamganj Mohalla area of Patna. It was sanctified first by Sri Guru Nanak Sahib Ji in 1509 AD and later by Sri Guru Tegh Bahadur Ji along with his family in 1666 AD.

When Guru Nanak first arrived in Patna with Bhai Mardana, he stayed here. Bhai Jaita Mal, a pious man, confectioner by trade, became Guru Nanak's follower and converted his house into a dharmsal.

Bhai Jaita Mal was too old to bathe in the River Ganga, instead with the blessing of Guru Ji a cow would help him bathe. The congregation that gathered here came to be called Bari Sangat or Gai Ghat Sangat. Later Salas Rai, a wealthy jeweler, became a Sikh and took the Guru to his own place in Patna where, too, a small community of Sikh believers was formed into what was known as Choti Sangat.

When Guru Tegh Bahadur arranged the reconstruction of the dharmsal, the labourers said the Tham's (wooden pillars) were too short. Guru Tegh Bahadur said they only looked small, when the tham's were lifted they became the correct size.

A new building comprising a spacious square hall with the sanctum in the middle was constructed during the 1980s. Gurdwara Sri Gau Ghat Sahib is about 4 km's from Takht Sri Harmandir Sahib Patna, on the Ashok Raj Path. The following things are preserved here.