The World No.12 Indian hardly broke a sweat and barring a couple of poor shots towards the end, dominated the contest throughout to comfortably win by a 21-8, 21-13 verdict.
Saina started her domination right from the start, easily pocketing the first game 21-8 in mere 14 minutes.
In the second game, the former World No.1 cruised ahead with a 11-3 lead at the break before the World No.47 gained a few points to reduce the margin but eventually the Indian brought all her experience into play to clinch the contest.
Gilmour progressed to the last four at the cost of another Indian Ruthvika Shivani Gadde, who withdrew midway into their quarter-final match with an injury.
The other Indian in the fray, World No.3 P.V. Sindhu will face Canada's World No. 48 Brittney Tam, later on Friday.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)