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Cost of Revenue | 9 Months Ended
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Sep. 30, 2013
Cost of Revenue | 15. Cost of revenue Cost of revenue consists of the following:
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2012 |  |  | 2013 |  |  | 2012 |  |  | 2013 |
Personnel expenses |  | $ | 203,011 |  |  | $ | 223,976 |  |  | $ | 583,649 |  |  | $ | 671,518 |
Operational expenses |  |  | 82,227 |  |  |  | 93,235 |  |  |  | 228,256 |  |  |  | 265,894 |
Depreciation and amortization |  |  | 12,015 |  |  |  | 12,078 |  |  |  | 36,035 |  |  |  | 36,317 |
|  | $ | 297,253 |  |  | $ | 329,289 |  |  | $ | 847,940 |  |  | $ | 973,729 |

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- Definition Disclosure pertaining to the amount and nature of costs included in cost of sales incurred and recorded in the period. + References No definition available. + Details
Name: | g_CostOfRevenueTextBlock
Namespace Prefix: | g_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration