G4 by G4 has sold 615,000 copies in Ireland and United Kingdom.
G4 certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Ireland |
15,000 | 1x Platinum | 2005 |
Ireland Sales: 15,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2005
|
 United Kingdom |
600,000 | 2x Platinum | 25 March, 2005 |
United Kingdom Sales: 600,000
Certification / note: 2x Platinum
Certification Date / sales as of: 25 March, 2005
|
| Total sales | 615,000 | (in 2 countries) |
Total
Sales: 615,000
(in 2 countries)
|
Year-end chart performance for G4
| Chart 2005 | Rank | Sales |
| UK Albums |
29 | 570,000 |
| UK Artist Albums |
26 | 573,000 |