SeeedStudio GD32 RISC-V kit - what standard is the pin-out, if any?

For the SeeedStudio GD32 RISC-V kit, what standard do the connectors/pinouts support - some version of Arduino?

SeeedStudio GD32 RISC-V and Arduous are both development boards, and they can communicate between boards by using communication interfaces such as IIC, U(S)ART, CAN, etc.