Says someone’s gmail hooked to my phone and can see my location

If it's there, the way to get rid of it is this:

Go to Settings. Tap on your name at the top of the screen to open "Find My". At the bottom of the page you will find the list of all of the people you have given permission to track you. Tap on the offending person's name and that person's Contacts page will open. At the bottom, tap on "Stop Sharing My Location". That's it.