The white trout are biting pretty good right now . Not sure about the pier action because we usually take the boat. I think anywhere you can get access around the Biloxi small craft harbor is good. Not sure west of there. We’ve been using shrimp, squid and ‘fish bites’.
I haven been flounder gigging in years but used to get them all the time anywhere along the coast. If tide & moon is right you’ll probably have some luck.