Default [Q]Gps or glonass?

Hi people i don't have n5 (collecting some gold for the device). It is possible to use only gps or only glonass system? I heard about glonass is much better and find faster than gps system. On menu settings it is only on/off toggle. It will be possible to getbtoggle like for data like 2g, 3g or mixed mode? Maybe it will be a kernel feature or sth.

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Phone: HTC Desire A8181 (AMOLED)
ROM: [CM10.1] Chromium ROM | Build 11 | bravo
Radio: 5.17.05.23
Recovery: RMD Recovery v1.0.3.4