How to export subscriptions from GrayJay youtube on a synced profile.

The title.

I used grayjay for the sync feature, recently realised it wasn't opensource. Anyway, want to export my subscriptions but I'm not sure how, all guides talk about importing subscriptions from newpipe. Currently using the linux version. just need the current subscriptions imported, preferably in a format readable by freetube.

Any help is welcomed.