The coordinates look like you're inside a building and the GPS reading is about 300m off your real position. That's an acceptable offset for your situation in my opinion given that you're using a GPS module with only a small integrated antenna. Go to an outdoor place where you have at least a 90° clear sky (no obstacles like trees or buildings) and measure again. You'll probably get readings that are accurate to about 5-10m.
Hello pylon, we are testing outdoor with hardware inside a plastic box, we use this antenna http://www.cooking-hacks.com/internal-gps-antenna, most positions are on 10m radius from real position, but some positiong give the wrong position, we take 72 position and only 2 are bad.