The good news is that at 2.5yo, it probably doesn't really matter much whether a child is "just" bright or GT.
Either way, you talk with the child, you take her to the park, you plan playdates, you read books together, you draw, etc. There's really no significantly alternate path needed for most kids that age. Even with a PG child, maybe the playdates are with older kids than the norm, you answer some odd questions and you support some unusual hobbies, but that's about all that's significantly different.
I think this is true especially if parent stays home with the child. Since 18-20mo I have seen some signs of possible problems in daycare settings. DD always does great when she is the youngest of the group and when younger kids come in she won't play with them at all. Now she has been the youngest for 4mo and I recently heard from my colleague that they will transition 4 younger kids to the group bit early next month. There is nothing wrong with those kids except that mine does not want to have anything to do with them. I'm already threading the time next spring when all her friends have moved out to next center to 3-4 year old group and she will be stuck in her current room for a while. She is a preschooler trapped in tiny toddler body, luckily some of her older friends seem like that too so she is not alone.
