All the pieces are falling into place in Gabriel's head. After the elite squad came to visit is when it all started happening. Connor instantly relinquishing all claim on Maggie. That first bit of heartache, it was exactly the same time as Maggie felt hers, starting just after the visit. The different times of s*x was what threw him off, but they were deliberate times. The first time was directly as the elite squad were leaving. They saw the start and it was like they were waiting for it.
He and Maggie having the same niggling feeling in their hearts the whole time.
This has all been a massive game, and he has been played.
Connor has somehow found Gabriel’s fated mate and sent her in to the half moon pack with the elite squad so he didn't notice. Connor has then proceeded to punish G
