Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many people lived in san gabriel in the year 2000?

### Inputs:
table_name: table, columns: ['No.', 'Barangay', 'Area (in km 2 )', 'Rank', 'Population (2000)', 'Population (2007)', 'Population (2010)', 'Population Density (2010)']

### Response:
SELECT COUNT Population (2000) FROM table WHERE Barangay = San Gabriel