Looking for info about the history of G Lake

I went camping this weekend at G Lake and found a few interesting things while paddling, fishing and exploring. It appeared that at some point there were several structures on and around the lake, as we found the foundations of a few scattered near our campsite and the surrounding area. I have included an album of pictures that show anything we found and was hoping that someone out there had some information on this history of this place and what these were? I tried a bit of googling and did not find much.

https://imgur.com/a/rOWVlCO