Gallacher won the league title with Rovers under Reds legend Sir Kenny Dalglish.
"He plays on the right-hand side of a front three for Blackburn, which suits him, because that is what he wants to do.
"For me, is mimicking Mohamed Salah and the way that he plays has been fantastic. He has been a breath of fresh air.
"You have to work hard, you have to tackle, you have to take elbows in the back of the head. It is different from the Premier League but the style that Blackburn play is very similar to Liverpool.
"When he cuts in, he can see the simple pass, or he can also play risk passes, which I like about him. He is also not scared to track back and do the ugly stuff, helping out defensively.
"Blackburn were really lucky to get him in because he is a quality young player and it is hard to believe he is only 17. Sometimes he is naive in certain aspects but the qualities he has are phenomenal."