MetaCTF was the event, rather short we only had 3 hours. I managed to not to fumble the apportioned iota of time, here's the result. I did a forensics problem, the prompt was minimal, they us a .g file and a silly pun.
What to do with that Weird, Quirky, Bodacious File?
Upon seeing this unfamiliar file extension I did whats natural and googled it. The first answer I got was "BRL-CAD geometry file", so in turn I tried to download "BRL-CAD" to open this file. This might have been a good idea but the damn program crashed on startup and I didn't have enough time to troubleshoot this bullshit (its a 3 hour CTF remember).
Now for new approach, the prompt was very fixated on the letter G so my mind came to g-code, a language used to command CNC machines and 3D printers. I opened Orca Slicer to see what I could do with the file. Orca Slicer is a 3D printing slicer which is a type of software that converts your nice 3D models into g-code, hence me using it. Here is where the serendipity manifests itself, first option I saw was to convert an binary g-code file into ascii. When I did that I found a series of comments (didn't know that g-code had comments) that spelled out the flag.