He was initially part of Gujarati evening news paper Janmabhoomi. Due to some differences he left Janmabhoomi and started new news paper named "Vande Mataram".
When the Nawab of Junagadh acceded his state to Pakistan in 1947, Samaldas headed a government-in-exile created by citizens of Junagadh to reflect the wishes of its majority population who wished the state to become part of India instead.
When Indian forces entered Junagadh and its principalities, Mangrol and Manavadar, at the invitation of the Nawab's dewan, Sir Shah Nawaz Bhutto, Samaldas was invited to accept the reins of the state but deferred to the Government of India.
Samaldas Gandhi is widely remembered in Junagadh and the state of Gujarat today as a hero and patriot. There are several schools, public foundations and hospitals named after him.
The Mumbai landmark Princess Street (Mumbai) has been renamed as Samaldas Gandhi Marg.