You can't just take any normal font to convert it for this application. Based on the information gathered, the fonts for the software have to be redesigned and developed especially to work with Graphics Advantage. However, the lack of information makes it impossible to provide the exact instructions to do this. Most of the developers, release fonts for these applications for an amount of money.
If you have the application, go to Help > About and contact the developers. They should provide additional information about this.
