GrovePi+ are compatible with Pi 2, please check the details from Dexter blog.
Carrying a GrovePi+ board together with 12 carefully selective Grove sensors with 10 pieces cables , this starter kit gets you up and running with the Raspberry Pi quickly. Just slip the GrovePi+ board over your Raspberry Pi and connect sensors to the board, you’re ready to start hardware playing and prototyping with the powerful platform.
About The GrovePi+, It is stacked on top of the Raspberry Pi without the need for any other connections. Communication between the two occurs over the I2C interface. All Grove modules connect to the universal Grove connectors on the GrovePi+ shield via the universal 4 pin connector cable.
About Grove modules, which work on analog and digital signals, connect directly to the ATMEGA328 microcontroller on the Grove Pi+. The microcontroller acts as an interpreter between the Raspberry Pi and the Grove sensors. It sends, receives, and executes commands sent by the RaspberryPi.
The GrovePi+ is compatible with Raspberry Pi A+,B,B+/2.
Please be notice: The Raspberry Pi board is not included.