I don't know if comptable, because is not the same I/O signal.
For seedstudio you have GND/VCC/RX/NC (connector )
and POT Multi I2C Bus pine64 you have GND/SDA/SCL/+5V (conector)
Seeed Studio sells a GrovePi+ Hat, shield, for Raspberry Pi that can be used with either analog, digital or I2C sensors. See:
<http://www.seeedstudio.com/depot/GrovePi-p-2241.html?ref=staffPicked>
All of the sensors use the same 4 pin type of interface connector. Each connector's label specifies the type of sensor it is compatible with. It is up to the user to make sure he/she doesn't plug the wrong type of sensor into an interface connector.
This page shows the 12 sensors that come with the GrovePi+ starter kit and has a link to additional sensors that are certified to be compatible with Raspberry Pi.
<http://www.seeedstudio.com/depot/GrovePi-Starter-Kit-for-Raspberry-Pi-CE-certified-p-2572.html?ref=newInBazaar
So yes it is reasonable to expect the certified Grove Raspberry Pi sensors will work with the Pine A64. The demo code for the Grove Raspberry Pi uses Python. Hence Linux and Python will be required to use the Grove Raspberry Pi sensors with the Pine A64.
Additional information about how how analog and digital, sensors signals are connected to a Raspberry Pi is shown below.
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.
hrh1818