Wednesday night’s second-leg is in the balance, with the young Gers edging it with three away goals, after a 3-3 draw in Switzerland three weeks ago.
Nathan Patterson, Danny Finlayson and Ciaran Dickson were all on the scoresheet in the first-leg as an injury time equaliser saw Young Boys draw level.
Head coach Graeme Murty is hoping Gers fans turn out in their numbers to support the under-19’s, he said: “It is a great game for us to look forward to, we have worked really hard with the players to get them ready for European competition.
“To go into this tie even, albeit we have got the away goals, is a real good test for the players so I am really interested to see how they will cope with that.
It is the first time the club have competed in the competition, gaining qualification after winning the Under-18’s League last season.
Gers are in the Domestic Champions path, along with 31 other clubs, with this route following a straight knock-out format where the matches are played over two legs.
Should Graeme Murty’s side progress to the second round they will take on Bulgaria’s Ludogorets or Slovan Bratislava of Slovakia in Round Two.
Fans can pay at the gate on Wednesday night with tickets costing £5 for adults and £3 for concessions. Kick-off is 7pm.