For those Windows Phone 7 users who are so dedicated to Google services that they would prefer not to use Bing Maps or Nokia Maps, then gMaps Pro has been a must have application for quite some time. To celebrate its 100,000th download, the author (Alexey Strakh), announced that gMaps Pro would be free for today - Friday the 8th of June 2012.
At the time of writing though, the application still hasn't been updated with its zero price tag. The developers are trying to ascertain what's going wrong. Our advice is to keep checking! You can also keep upto date by following our source link.
Update: gMaps Pro is now available for free (for 24 hours).