Scally expects to make an announcement by the end of March, with the new ground likely to be built in the Medway area of Kent.
And the Gills could be playing at the new arena within three years.
"It depends on discussions that will take place in the next six weeks, but I would like to think we would be in a new stadium by August 2010," Scally told BBC Radio Kent.
"I think there is massive potential in Medway and the area has a great future. We want to be a part of it and we want to bring Premiership football to Medway.
"I'm not saying that just because we get a new stadium it will take us into the Premiership, but it gives us a better chance."