The Hawaii thing is ceremonial and not relevant, I think Damian Lillard or someone like that has just been named GM of his old college it's just a PR recruiting gimmick. Patty lives in Hawaii.
When players are near the end of their NBA careers if no team is offering them a contract on the eve of training camp some of those FA's keep themselves available so when teams look at what they've got and what help they might need a team might decided in camp or early in the season it needs a PG (Patty) or a big (Simmons) etc.
So there is probably a reasonable chance an NBA team signs Patty at some point this season but might not even be until mid-season that it happens.