[Question] MicroUSB port both to FPGA and pins on FPGA

[s5bug]

I'm new to this whole hardware thing, so what I want might not even be possible, but:

I want the same MicroUSB port to connect to both the FPGA (so I can write code to it) as well as pins on the FPGA. The main use is as a GameCube controller, but I'd like it to be able to be used via USB at the same time. Is there a way I can accomplish this? Is it even safe to have the FPGA connected to both a GC port and USB at the same time? If yes to both, how/what should I be looking for?