Global ply ID results are not read into Femap from MSC Nastran op2 files. Instead we are just given the sequential ID, starting at 1 and ending at the N'th ply.
I know there is the "Model => Output => Global Ply" tool but this is proving very slow on a a model with only ten thousand elements and one load case.
If a user has gone to the effort of generating global ply ID's then it seems highly likely that he/she want them used in the results.
Feature request: Refer to global ply ID's for results by default on import