The 18-year-old struck a penalty just before the hour mark to secure a 1-0 win over Cowdenbeath at Central Park.
Coming on the day when Francisco Sandaza was added to the long term injury list it seems Gallagher is moving closer to a top team inclusion.
However, while the forward would relish that chance, he knows he still has much to learn as he bids to make the next step.
He said: "For me it's just about concentrating on developing just now.
"If the manger thinks it's the right time and I'm good enough and the opportunity presents itself then I'm happy to step up.
"For now it's just important to keep working and plugging away in whichever game you're involved, until the time is right.
"This reserve league that we're in just now is really good preparation for us. Physically for the younger players it's a real battle.
"What we don't have in size though we have in ability so we don't have any lack of confidence when we're put in that squad."
Gallagher faced a difficult physical battle all night against the home side's defenders but was delighted to get his reward for a hard shift.
He added: "I was really pleased to get the goal.
"The boy I was up against for most of the night was a big, strong lad and it was difficult to get round him at times but towards the end we got more width and I think that's why we won the game.
"I'm happy to do the work in that role and if the team benefits from it then I'm comfortable with the work."