Combine gelatin and remaining water in a small bowl and whisk to dissolve gelatin.
Place the gelatin mixture in a large bowl. Place bowl in a larger bowl of ice.
Beat the gelatin mixture with an electric mixer set at high speed until foamy. Add sugar syrup gradually, beating continually. Beat until mixture is thickened.
Grease a 13x9-inch dish. Pour gelatin mixture into prepared dish. Let stand to set, about 30 minutes. Cut into squares.