GO based on NCBI annotation

Question

[Jautis]

Hello,

I have RNAseq data for a non-model organism whose genome has been annotated by NCBI but not ensembl. I've been looking at methods for GO/GSEA but they all seem to rely upon ensembl gene IDs and annotations. Are there any similar options using NCBI annotations gene ids or db_xref labels?

Thank you very much!