GATE exam application forms are available for downloads from 21st of September !!! You can buy them either online or offline. Offline applications are available in State Bank of India at various stations. Know more about them here. The GATE committee, which comprises of representatives from the administering institutes, is the sole authority for regulating the examination and declaring the results.
GATE is conducted through the constitution of eight zones. The zones and the corresponding administrative institutes are:
For more infos here: GATE Resource Centre