No, Google Maps doesn't know if you've taken pictures at a location unless you explicitly contribute them. Here's why:

• Street View Cars: Google uses specially equipped cars with cameras to capture Street View imagery. These capture data independently and are not connected to individual users.
• Privacy: Google prioritizes privacy and doesn't access personal photos from your phone or camera.

There is a way for users to contribute panoramic images to Google Maps, but this is a separate process and requires opting in. So, unless you specifically choose to share your photos, Google Maps wouldn't be aware of any pictures you take.