@nnekatoken This is unique. Good work with this! Your HTML markup is mostly valid, with <html>, <head>, and <body> elements. I like the hover effect over the timeline boxes. Well done not selecting IDs in your CSS. You even added some comments to your HTML. 
You’re using inline styles in your HTML like style="font-family: 'Futura'" and style="text-align:center; font-size: 13px;". Some say that this is not the best practice and it’s ideal to separate the function (HTML) and design (CSS). Here’s a good resource for learning more about that.
I’m not familiar with your gd-item class. What does that stand for or is this something native to Bootstrap? If it’s something that you created, you may want to make it more semantic so that others (like me) 
will know what it refers to.
I can’t see anything else that sticks out at me about your code, so well done! 
I’m looking forward to seeing your future projects.
You gave me an idea for my tribute page! Thanks mate.
As for the website, looking good. 