I think the challenge that Gateway Green had was that they just couldn't compete with Jawl Office to line up tenants. This isn't due to anything nefarious on Jawl's part: Jawl simply has long-standing relationships with many major office tenants in town, and their buildings are well-run and highly regarded (even the retail tenant mixes on the ground levels tend to heavily favour local businesses and cafes). I believe Jawl likely has an anchor tenant lined up for its planned office redevelopment of the Capital 6, and that building is still in its initial planning stages; Gateway Green had approvals in place years ago but failed to line up any tenants. Tri-Eagle seems to have had more success in its suburban office buildings as these generally don't compete directly with Jawl.
My assumption is that this site will be redeveloped as rental apartments unless it's bought by Jawl.
I was the IT director at the LTSA back when GG came onto our radar as the org was planning to move from the old HO location on Davidson St in Saanich.
One of the primary reasons LTSA never signed on and eventually moved to the Atrium - in spite of its hefty price tag - was that the Jawls had a definite vision and more critically a concrete timeline for its construction. The GG folks never could provide much if anything in way of substantive info re a construction framework never mind an actual schedule,and like any org needing more space "now" the LTSA wasn't prepared to sit around waiting forever......