That's fine. Hopefully he has the natural strikers insticts/movement. As hardworking as Gall is, he doesn't instinctively move into areas where the ball will go until the pass/cross is hit. Someone who is has that naturally would have scored a load in the last few weeks for us.
Thomson would be my preference also at the moment, I'm also not sure he is a natural striker but he will be more of a handful for any defence.