I am developing a mobile word game in which the word list and word definitions come from the GCIDE Dictionary. According to my research this software is released under the GNU General Public License.
I am not using the dictionary's software, only the words and definitions that the software uses, which are originally compiled from other dictionaries (1913 Webster, WordNet, etc). I downloaded the word list separate from the application and copied it to my own formatted file.
My research on the license has led to a lot of concern with this:
Is this considered using/distributing the licensed dictionary software?
Am I able to sell my mobile game without releasing the source code to the public?
If I sell my mobile game, are purchasers able to redistribute my software freely since the dictionary is under a free license?
I want to avoid any future problems with this, so any suggestions are appreciated.