No, there are ~70 or more third-party projects building on the Apache TinkerPop Gremlin platform, and new ones are popping up all the time. My first thought was this is likely a new project site for a Gremlin client library or service provider that was still using placeholder images for branding [1].
When a new third-party project site goes online, SOP is to review the new site/code, understand what it is and how it fits into the overall ecosystem, and then put their project lead in touch with TinkerPop's resident artist and illustrator, Ketrina Yim [2], who is available to create custom artwork/logos and Gremlin character illustrations tailored around the new project's theme.
However, when I dug into this site's docs to see how it was related, I couldn't find a clear connection. And when I checked with our team, they said Apache Legal has been aware of the issue since last year.
[1] Branding https://tinkerpop.apache.org/policy.html
[2] Ketrina Yim, Illustrator https://tinkerpop.apache.org/index.html#committers