Yes, Addictive Drums can use Groove Monkee midi files. I do not remember if they installed automatically or if I copied them into the Addictive Keys Midi file location. When I installed Groove Monkee, it asked me to check a box for Addictive Drums along with other drum programs I had. You might need to reinstall your Groove Monkee files if you have Addictive Drums installed after you first installed GM's files, and try to see if it autoinstalls the Groove Monkee midi files for AD. You will then need click "Refresh Library" which is on the Beats page of Addictive Drum. It will then take a minute or two and show you all the midi files available.
You can also check and see which midi files are in your folder. My AD midi files are located in a midi user files at:
C: Users/your computer name/my documents/Addictive Drums/User Midi Files. You will need to supply the patch for "your computer name.
[Edit: i just googled this and saw that another cakewalker had his User Midi File in this location: C:\Documents and Settings\Owner\Documents\Addictive Drums\User Midi Files ]
As an alternative, you can change the AD Midi Map Preset to "GM" and drag and GM midi file into your DAW and AD should play it. This Midi Map Preset is located on the Beats page on the right side, two thirds of the way down the page. Click on the Map Preset "startup" and it will show other mappings that it can use. I would not do this unless you find that you can't import your midi files into the AD User Midi File location.
I really think that if you reinstall your Groove Monkee files and check "Addicitve Drums" that it will install the correct midi files for AD and you will just need to Refresh Library. [Edit: Here is the GrooveMonkee PDF, which has a section on Addictive Drums installation:
http://bonzo.groovemonkee.com/resources/docs/groove_monkee_manual.pdf ]
Hope this helps.