Baba Gurinder Singh Dhillon became the successor to Maharaj Charan Singh

Charan Singh (guru)

Maharaj Charan Singh Ji was a Sant Satguru from India. He became the fifth Satguru of Radha Soami Satsang Beas in 1951 following the death of Sardar Bahadur Jagat Singh, and served until his death at the age of 73....

 at the age of 36 years on June 1, 1990. He is the second youngest person to be appointed to head the Radha Soami Satsang Beas

Radha Soami Satsang Beas

Radha Soami Satsang Beas is a spiritual society founded by Jaimal Singh in 1891 at a site called Dera Baba Jaimal Singh on the West bank of the Beas River, Punjab, India....

 headquarters, (Charan Singh was 35 yrs old at the time of appointment, and Jaimal Singh was 38 yrs old).
Gurinder Singh Dhillon was born to a Sikh

Sikh

A Sikh is a follower of Sikhism. It primarily originated in the 15th century in the Punjab region of South Asia. The term "Sikh" has its origin in Sanskrit term शिष्य , meaning "disciple, student" or शिक्ष , meaning "instruction"...

 family of the Dhillon clan who were followers of the Radha Soami

Radha Soami

Radhasoami is a philosophical organization originating in 19th century India, and considered by adherents as a true way to attain God realization...

 gurus at Beas.