I actually made a widget that does exactly this. Bear with me, since it was built in Mendix 5, so there might be some issues, although it's not much more than a wrapper for the phonegap plugin.
This doesn't work from a datagrid though, but it does in a template grid / listview / whatever, als long as it's given the correct package name (com.google.yourapphere)
Please let me know if it doesn't work and I'll see if I can make some time to update it.
Link to appstore: https://appstore.home.mendix.com/link/app/3232/
That is more a stackoverflow question: https://stackoverflow.com/questions/22168015/phonegap-open-external-application
i have solved a simular problem in a mendix project. where do you need the connection with Google play for?