Yes. Multiple GOTs (GOT 3000 series and GOT 2000 series) can be connected to one Mitsubishi Electric PLC via Ethernet. The number of connectable GOTs differs depending on the controller.

1. When connecting to the MELSEC iQ-R series, motion controller CPU (MELSEC iQ-R series), C Controller module (MELSEC iQ-R series), MELSEC-Q, QS, QnA, L, A, or motion controller CPU (Q series) 
For Ethernet modules, up to 128 GOTs are connectable (16 or less are recommended). 
However, there are the following restrictions. 
• For an RJ71EN71, the maximum number of connectable GOTs per network is 119. 
• For models other than the RJ71EN71, the maximum number of connectable GOTs per network is 63.

2. When connecting to the MELSEC-FX
When an FX3U-ENET-L is used, up to two GOTs are connectable. 
When an FX3U-ENET-ADP is used, up to four GOTs are connectable.

3. When connecting to the Built-in Ethernet port CPU or C Controller module, up to 16 GOTs are connectable. 
For the MELSEC iQ-F series, up to 8 GOTs are connectable.