I think you'll struggle to get a complete history as most books that I've come across tend not to deal with the bulk of the Regiments that went to India after the partition in 1947. Having said that I've read a few books on the Gurkhas and can recommend these as jumping off points for you but they are mostly about the British units

• The Gurkhas by John Parker

• The Gurkhas by Chris Bellamy

• Valour: The History of The Gurkhas by ED Smith