27 year old Private Rita Rana followed the footsteps of her ex British Gurkha father to join the British military in 2010. As there is no record of any other Nepali women in British Army, she can be termed the first female Gurkha.
Rita’s father had served 27 years in 2Bn the Royal Ghurkha Rifles. But, she is not in the Royal Gurkha Rifles, and can’t be termed a Gurkha officially.
Pte. Rita Rana is from the Germany-based 1Bn the Princess of Wales’ Royal Regt. (Read more here, a 2010 news article)
[Note: Private (not Parvati) is the lowest military rank in in army, commonly referred as Pte.]