Hi
Yes it seems so. I havn't tried it myself, but this is taken from the document "Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix"
Gigabit Ethernet Transceiver Platform Support
Catalyst 3750 series
(Continued)
WS-C3750G-12S GLC-T (10/100/1000)
12.1(14)EA1
/Mikael