Match officials need help on big occasions...
The issue has come into focus once more after England had a goal disallowed in their 4-1 defeat by Germany at the World Cup on Sunday.
With the score 2-1, Frank Lampard's shot smashed off the underside of the crossbar and clearly crossed the line.
The goal was not allowed to stand though, and Gallagher, who refereed for 15 years in the Premier League until retiring in 2007, feels that the time to act on the issue has arrived.
"It is ridiculous, because in the Europa League we've got men behind the goal," he told Sky Sports News.
"We've got referees miked up in the Premier League, we've got referees' assistants with buzzer flags, we've got all kinds of things to help referees at a higher level because the stakes are so high.
"You're playing at the biggest tournament in the world and suddenly a game is decided, or undecided, by something which could have been tidied up in four seconds and it's not a judgement call.
"It was actually a statement of fact. The ball was over the line and it would have made such a big impact on the game because England would have scored twice within three minutes and would have been right back in the game."