I think you may be confusing a map data on a card with a GPS.
Garmin has some apps at https://play.google.com/store/apps/developer?id=Garmin but nothing seems to approach the Garmin GPS functionality.
http://www.cnet.com/au/topics/gps/ notes a few GPS models but for 99 to 199 bucks I'd buy a Nuvi.
I want to know if I can put a Garmin navigator micro sd in my samsung grand prime and use it for GPS in Ireland?

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