Hey there booch79,
It sounds like you're having some trouble with Google Maps on your iPhone.
Are you running the most recent version of iOS?
Do you have the Google Maps app fully updated as well?
If so, have you tried toggling Location Services off and back on again?
You can do this for the iPhone and the app itself, while making sure the locations settings are configured as need be.
Turn Location Services and GPS on or off on your iPhone, iPad, or iPod touch
Lastly, you can try reinstalling the app as well to help isolate the issue. If you continue to run into complications, you can reach out to the app developers for further investigation.
If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
Warm regards.