They are among 10 new faces called up for the challenge match against Estonia in Paisley at the end of the month.
Both have impressed at club level having broken into the first team in recent years.
He is now in with a chance of swapping the black and white of the Buddies for the dark blue of Scotland at his home ground, the Paisley 2021 Stadium, on Tuesday March 28 at 7.30pm.
Fellow Gourock footballer Taylor is also likely to feature following his impressive form for Kilmarnock.
He has been an ever-present for the Rugby Park side since breaking into the first team at the end of last season.
The Estonia match will be a warm-up for the UEFA European Under-21 Championship qualifying round, which begins in September with a home tie against the Netherlands.
An U20 squad will also travel to France to compete at the Toulon Tournament in May as Gemmill prepares his team for the qualifiers.