If they're brand new then yep they'll just be plug and play. If they're used reset them to factory settings first.
Modern HP switches don't support non HP gbics. Also some early HP gbics, arn't supported on newer firmwares and newer switches.
Since you're using 2610s which are relatively new I doubt any of the above will apply.
EDIT: Also depending on how the patching is arranged it's possible to get the two cores the wrong way round, unlike cat5 they won't sort them selves out.