Doesn't seem to be, I can see LittleSnitch itself connecting to yoyo.org and obdev.at. GP may be referencing a past bug, either in LittleSnitch or macOS.
If it connects to yoyo.org, you have subscribed to Peter Lowe's blocklist and Little Snitch is trying to update the list from there.
If it connects to yoyo.org, you have subscribed to Peter Lowe's blocklist and Little Snitch is trying to update the list from there.