The school I’m working with had a problem with the first print they tried on their Mini. The put a few gouges in the PEI sheet, and about a 1/4" diameter hole melted all the way through the sheet and the nozzle was grinding around on the glass. Despite all that, the glass was fine. We just needed to replace the sheet (and get the tool head unclogged).
So if you’ve just got a minor gouge, I’m sure your glass is fine.