Celtic's Johnston and Chelsea's Gilmour linked up for Scotland's Under-21 clash against Andorra.
Some Glasgow Rangers fans were delighted to see Billy Gilmour's display one year after his departure from Ibrox.
Billy Gilmour left Glasgow Rangers to continue his development with Chelsea in 2017.
Teenage star Gilmour left Rangers to join Chelsea last summer.
Losing Billy Gilmour to Chelsea continues to be a source of frustration at Rangers.
Ibrox side Glasgow Rangers could have more Billy Gilmours on their hands soon, says Peter Lovenkrands.
A number of Glasgow Rangers fans were delighted to see the former Ibrox starlet sign a professional deal with the Premier League side.
Ibrox side Glasgow Rangers lost Billy Gilmour to Chelsea last year.
Former Rangers talent left Ibrox last summer.
Billy Gilmour has explained his decision to leave Rangers last year.
The former Celtic talent's career has stalled dramatically in London as Gilmour is also linked with a switch from Glasgow to Chelsea.
The former Rangers assistant has a new role at Aston Villa, nearly a month since his acrimonious Ibrox departure.
The former Rangers boss is reportedly in the running to replace Andries Jonker as Arsenal's academy director; could he return to Ibrox for one of the Gers' hottest prospects?