Theoretically, you bind model the center and then you have it. Or, at least as a user that is what I would expect. Can you confirm whether that is working?

Edit: v-model:center="center"

<template>
  {{ center }}
  <GMapMap :center="center" />
</template>

<script setup>
import { reactive } from "vue";

const center = reactive({ lat: 0, lng: 0 });
</script>

Nope, that didn't work. Thanks though.

I had a look through the code and found these events on the GMapMap component:

  center_changed
  zoom_changed
  bounds_changed

Which also provides the relevant information as a callback. Hope this helps someone else in the future!

Oops - of course binding it wouldn't propagate the update back. I would still consider this an issue, because this should be available through v-model here. With the power of Vue 3 v-model, there no longer needs to be any strange v-bind.sync patterns going on when there is more than one value to model.