GSEA on non-model organism

[Adithi GR]

Hello everyone, 

I'm new to GSEA. I'm currently working with CHO (Chinese Hamster Ovary cells) and was wondering what dataset that exists in the broad institute should I make use of. I looked at literature review and mostly they have used human or mouse datasets and was wondering if that is the right way to go about this?

Also in one of the papers, they have used "c5.bp.v3.1.symbols.gmt" as their expression dataset. However, there is no information on the CHIP platform what could that be if you would know please let me know.
Please refer to the 2.4 and 2.5 methodology section.

This is the paper link:
Transcriptomic analysis of clonal growth rate variation during CHO cell line development - ScienceDirect 
Thank you