no mention of a case/chassis but from the list it looks like its a pre-built system so I'm guessing there will be no issue with a graphics card fitting but if its not and your planning on building it yourself the biggest potential issue i can see is that the graphics card not fitting into the case.
but also a good resource if you want to explore more is
https://pcpartpicker.com/list/
it will tell you any known issues with compatibility or even potential issues like graphics card not fitting it will also find the best prices from a range of outlets