You see, while 'Hello, world' might seem innocent enough as a first tweet it is actually a phrase that'll have many programmers around the world smiling.
'Hello, world' are the first two words that any programmer will type when they start learning code.
The simple act of making those words appear on a screen is a simple, but effective first task for many coders who want to learn a computing language such as Python, Java or C.
GCHQ's presence on Twitter marks the first time a UK intelligence agency has had a presence on social media and is part of a push to increase the visibility around what GCHQ does.
A blog entry on GCHQ's site explains: "We want GCHQ to be more accessible and to help the public understand more about our work. We also want to reach out to the technical community and add our voice to social media conversations about technology, maths, cyber security, and other topics where we have a view."
With government bills like the 'Snoopers' Charter' pushing government surveillance well into the limelight the hope is that GCHQ's increased presence online will provide transparency about what the agency does on a daily basis.
Unsurprisingly GCHQ's arrival on the social platform has been met with some wry skepticism from followers on Twitter.