The Sony Vaio G series was a range of ultraportable subnotebook computers launched in 2007 with a 12.1-inch display.

Launch specs were a 1024x768 12.1" screen, Windows Vista, Intel Core Solo low-voltage U1500 (1.33GHz) CPU, Intel GMA 950 graphics, 1GB RAM and a 100GB 5400rpm hard drive. It weighed 1.13kg and included DVD burner, Gigabit Ethernet, Bluetooth and 802.11abg wireless. In October 2007 the model was updated with Intel Core 2 Duo U7500 (1.06GHz) CPU.

One configuration exclusive to the Japan market featured an Intel Celeron SU2300 (1.2GHz), 2GB-8GB RAM, Core 2 Duo SU9400 (1.4GHz) or SU9600 (1.6GHz) CPU, a choice of hard drive or dual SSDs, and Windows 7. It was possible to order a G Series without an optical drive, in which case the weight is reduced to 868 grams. [citation needed]