GR-SAKURA features the 32-bit RX63N microcontroller and offers Arduino UNO compatible pin-headers and C++ template and libraries.
GR-KURUMI features the 16-bit RL78/G13 MCU, is compatible with Arduino Pro Mini and is ideal for small, low-power gadgets.
GR-KAEDE featuring the 32-bit Renesas RX64M MCU, enables you to treat image processing via dedicated bus and on-board SDRAM.
GR-PEACH features the RZ family's RZ/A1LU MPU and was created for high-speed prototyping of IoT devices with loads of HMI.
GR-COTTON has full color LEDs to link between light and design, allows you to use a CR2032 battery and write a program via USB cable.
The GR-CITRUS board enables easier to program with Ruby language. Of course you can program like Arduino sketch.
The GR-ADZUKI board was designed to make on-board connections easier, be it a DC motor, servo, sensor, or battery box.
GR-ROSE featuring the RX65N MCU, enables robot and IoT systems prototyping with simplified processing via open-source software.
IDE for GR is the development environment that enables to program offline. You can use like Arduino IDE.