| Gnayiru | |
| Settlement Type: | Suburb |
| Pushpin Map: | India Chennai#Tamil Nadu#India |
| Pushpin Label Position: | right |
| Coordinates: | 13.2561°N 80.2043°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Tiruvallur |
| Subdivision Type3: | Taluk |
| Subdivision Name3: | Ponneri |
| Subdivision Type4: | Metro |
| Subdivision Name4: | Chennai |
| Unit Pref: | Metric |
| Elevation M: | 15 |
| Population Total: | 4516[1] |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 600067 |
| Area Code Type: | Telephone code |
| Area Code: | 044-xxxx |
| Registration Plate: | TN-18-xxxx & TN-20-xxxx(old) |
| Blank2 Name Sec1: | Planning agency |
| Blank2 Info Sec1: | CMDA |
| Blank3 Name Sec1: | City |
| Blank3 Info Sec1: | Chennai |
| Blank4 Name Sec1: | Lok Sabha constituency |
| Blank4 Info Sec1: | Thiruvallur |
| Blank5 Name Sec1: | Vidhan Sabha constituency |
| Blank5 Info Sec1: | Ponneri |
Gnayiru, is a neighborhood in Chennai, Tiruvallur district,[2] [3] located North of Chennai, a metropolitan city in Tamil Nadu, India.
Gnayiru has a historical Hindu temple viz., Pushparatheswarar temple,[4] [5] which is under the control of Hindu Religious and Charitable Endowments Department, Government of Tamil Nadu.