If you are using GeLB server for your publication, please cite:

Mishra B, Thines M (Unpublished manuscript) GeLB - a webserver to produce Gene-Level Bootstraps for multi-loci phylogenetic analyses. http://www.thines-lab.senckenberg.de/gelb-alignment

In this work-flow, the Perl code FASconCAT-G_v1.05.1.pl was utilized in the back end.
Please also cite:

Kück, P., Longo, G.C. FASconCAT-G: extensive functions for multiple sequence alignment preparations concerning phylogenetic studies. Front Zool 11, 81 (2014). https://doi.org/10.1186/s12983-014-0081-x