No I dont think he would have. I think the loss of her was in part what enabled him to leave them behind simply because life on the streets without her was unbearable to him in some respects. I'm not saying he couldn't have gotten over it, I just think losing her made him open to a new situation in a way he wouldn't otherwise have been.
I think he would have taken her with him. In fact, I think Alana would have been an added incentive of Gunn because being part of Angel's crew and being based in the hotel may have appeared like a safer, better life for them.