An example of using the System.Device.Location
method, this should be what you're looking for.
Add-Type -AssemblyName System.Device #Required to access System.Device.Location namespace
$GeoWatcher = New-Object System.Device.Location.GeoCoordinateWatcher #Create the required object
$GeoWatcher.Start() #Begin resolving current locaton
while (($GeoWatcher.Status -ne 'Ready') -and ($GeoWatcher.Permission -ne 'Denied')) {
Start-Sleep -Milliseconds 100 #Wait for discovery.
}
if ($GeoWatcher.Permission -eq 'Denied'){
Write-Error 'Access Denied for Location Information'
} else {
$GeoWatcher.Position.Location | Select Latitude,Longitude #Select the relevent results.
}