Guess i am late to answer, but it will connect to GPON at 2.5/1.25Gbps BUT ethernet will be limited to 1Gbps on SFP, trying to find something similar myself, but it doesn't exist as far as i am aware. There are 10G/10G and 10G/2.5G XG-PON modules, but they requite XG-PON OLT.