Link Aggregation, humm... No, it does not support. Why do you need link aggregation on G3100? From WAN side, Verizon only offers gigabit service maximum. For LAN switching purpose, you want two ports aggregated uplink and two ports aggregated downlink? This would occupy all the LAN ports and you would need to buy a managed switch anyway. The only reason I can see for the need of link aggregation is taking advantage of the 802.11ax 5GHz at 2400Mbps (PHY) for LAN communication?
I believe G3100 has an internal switching capacity of 3Gbps, and it has a MoCA 2.5 interface at 2.5Gbps. You can buy an Actiontec ECB7250 ($110) with 2.5Gbps 802.3bz port to create a 2.5Gbps layer 2 link to the G3100. Then, you need a $300 multigigabit switch to drive the 2.5Gbps throughput or an NIC rated at 2.5Gbps.