This happened in the sixties, during and after the six-day war between Israel and Egypt. Therefore I think a movie could be made out of this story any day now.
It's been a couple of years since I watched it, but I don't recall the GBLA being mentioned in the film.
For anyone interested, the film we're talking about is the 2015 documentary "Bitter Lake" by Adam Curtis which tells the story of how an agreement signed on the Great Bitter Lake back in 1945 could have had an unexpectedly huge impact on how the modern world developed through the next 60+ years.
Indeed, coincidentally just watched this a week before the Ever Given blockage. It's relevant to this thread. The soundtrack, the archival footage and the pairing between them makes for fantastic viewing, although I personally found this not as intellectually interesting and even more 'tenuous' than Hypernormalisation or Can't Get You Out of My Head.
What would you do as a plot? The pilot episode with the start of the war would surely be interesting, but the wait+party time of the next 8 years would probably not make for a good plot. Except if you'd want to make a party movie, but that would probably go against the spirit of the GBLA.
There's certainly been successful films made around much less. Hell, Castaway is basically 3 hours of Tom Hanks talking to a coconut and it grossed over $400 million.
Opening scenes - war, realising they were stuck. Then the drama of eight years of hanging about and drinking - there must have been romances, conflicts, gossip, smuggling, fights among the crew. And what's the story of the one female member? Plenty to make a great film out of I bet. And if not someone could always 'base' it on 'real life events'.