There is an option to add the app group to the home screen, but it apparently doesn't work. Your best bet would be to:
1. Go to the Home screen you want the Group on
2. Open the Apps app.
3. From the drop-down menu on the left, open the Group you want to add. Press and hold the first App icon.
4. Drop the app onto the home screen
5. Repeat 1-3. Drop the 2nd icon on the 1st. It creates a folder.
6. Drop the 3rd,4th,5th,etc app into the folder
6. Keep doing this until all your apps are in the new folder and rename it to whatever you want