The important thing isn't so much compatibility with your APU: it's what sockets your motherboard has. Chances are, it has a PCI Express x16 socket, which means that pretty much any graphics card will work/be compatible. But then, you need to make sure that your APU is fast enough to feed data to the graphics card as quickly as the graphics card can take it - or, alternatively, that the graphics card doesn't become the bottleneck in the system because it's not fast enough to deal with the output of your APU. The other thing to bear in mind is whether your power supply is good enough for a mid/high end graphics card.
Surface Pro 5 News - release date, UK price, features, specs