What is Gdo?
1.
The device used to open the
Upon receiving this signal, the SGC has the choice of either sending a 'go' or 'hold' code back to the GDO. The former indicates that travel to Earth is safe, while the latter indicates that the arriving SG team should hold their position due to some difficulty.
The GDO was referred to earlier as simply a "transmitter". The acronym GDO stands for "Garage Door Opener".
Teams returning through the Stargate to Earth use their GDO to identify themselves as friendly.
2.
Simply meaning "Get Dosh Out". As whereby someone will withdraw from their bank via an ATM.
"Hey, where are you going?"
"Im just going to GDO see you in a fiver"
See