It is possible, bus_aviator, that this is just a formality so that nobody complains that they weren't asked. Seniority is a double-edged sword. If there are no people requesting it (which would normally be entertained from top seniority downwards), then they would likely start selecting the most junior people (from bottom seniority upwards). For certain, Airbus pilots have options available but I can appreciate that Gulf Air is also trying to run a business. Personally, I prefer to see them advertise and fill these vacancies internally rather than get Direct Entry Captains and FO's and then surplusing Airbus pilots as they become redundant.
But as you said, a lot of details are missing and it will be interesting to learn more as events unfold. Staying tuned!