Hi David, unfortunately there isn’t an integration like that right now, but I’ve added it as a feature request for our team!
To help with tracking gallery views, here are a couple of workaround things you could also consider:

1. Standalone galleries (enabled in your Envira settings), will give all of your galleries a unique URL instead of having to embed them in a page or post. This allows you to easily link to the gallery and track views the same way you would a page or post.
2. Deeplinking (enabled in the Lightbox configuration tab) will give all your images in the gallery they’re own URL using anchor links. So when a visitor views an image in the lightbox, the URL will have “#image-title” at the end of it. Google Analytics doesn’t track anchor links by default, but MonsterInsights does have a 1-click feature to turn on anchor link tracking, which would allow you to track individual lightbox images as pages.

I hope this helps! Feel free to reach out to support if you have any questions. 🙂