Push notifications triggered by GPS co-ordinates (geofence) - is this possible with Glide?

I’m interested in creating an app which will enable push notifications when a user enters given geofences. (Users will need location tracking enabled of course). Specifically, I’m interested in inviting them to take part in a market research survey about rail journeys, when they enter a railway station, in UK (users will have agreed to this when they first download the app).

I’ve no idea where to start - can’t see if this is possible with Glide.

Long term, if it works, we’ll get a professional to build this app, but I just want to test the basics for now to see if it’s viable - hence going for low cost option.

Thanks for any advice.

You can’t do notifications yet with PWAs on iOS, and per your post I think that’s pretty crucial.