To load a language pair which isn't part of the config, all you need to do is specify the language code as pairs.
You can find the valid pairs in Homepage section of Dataset Description: http://opus.nlpl.eu/GNOME.php
E.g.
dataset = load_dataset("opus_gnome", lang1="it", lang2="pl")
Supported Tasks and Leaderboards
[More Information Needed]
Languages
[More Information Needed]
Dataset Structure… See the full description on the dataset page: https://huggingface.co/datasets/Helsinki-NLP/opus_gnome.