Special banners with 'welcome' messages in English and Hindi were put up by the authorities.
Faraz Abbas, deputy secretary, ETPB, told PTI that 1,100 pilgrims had arrived in the special train.
"A second batch of some 400 Sikhs will reach here by train later," he said.
The main Baisakhi festival will be held at Gurdwara Hasan Abdal in Rawalpindi district, 50 km from Islamabad, on April 13.
Abbas said strict security measures had been put in place for the pilgrims, adding that Pakistan Rangers had been deployed to protect them.
During their 10-day stay in Pakistan, the pilgrims will visit Gurdwara Janamsthan in Nankana Sahib, Gurdwara Dera Sahib in Lahore, and Gurdwara Punja Sahib and Gurdwara Sacha Soda in Farooqabad, he said.