It pretty much is - it's built on Google Custom Search Engines (https://cse.google.com), which have been around since 2006 but never seen a lot of promotion from Google.
I'm trying to bring attention to them, and make them more discoverable. If Google wants me to change the name, I will - but it's a tribute project.
I'm not a lawyer, nor do I speak for my employer, but yeah: you should strongly consider changing the name and branding. I like the idea and the sentiment behind it, but I think it could be done just as easily without using Google's IP.
I'm trying to bring attention to them, and make them more discoverable. If Google wants me to change the name, I will - but it's a tribute project.