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GPS location widget will give you current location on a map but the marker is moveable. Now, I'm not sure if you want your users to see the map or not. For example, if you choose not to show the map on your form, you will receive in submissions Address, Town, Country, Latitude and longitude of the location:
On the other hand, if you choose to show the map, users will be able to drag the marker, but if you don't want to show the map on the form you can hide it:
Other GPS widgets you can check here.
Hope it helps, if you have any further questions please let us know.