The previous Forza site, you were able to search up a persons GT and look through their gallery. Is there no way of doing that on the new (current) layout? 
If you know the gametag you can simply edit the URL
Such as mine would be
http://www.forzamotorsport.net/en-us/gallery/fyerball 72
Yours would be
johniwanna
I think you get the point 