pageview

send pageviews using the official object structure, just a string or even the router object
export default {
name: 'MyComponent',
methods: {
track () {
this.$gtag.pageview({ page_path: '/about' })
this.$gtag.pageview('/about')
this.$gtag.pageview(this.$route)
}
}
}

Remember, this is just an example. check the all API parameters in the official gtag documentation here