Geotextile fabric is designed to allow water to pass through. If you coat it with asphalt sealer, that can no longer happen. Coating maybe the last 1/2" to keep it from unraveling would probably be ok.Coating all of it will just cause your gravel pad to flood at the edges.
1999 Newmar MACA 3796 F53 6.8L
2016 Ford Edge Sport
Roadmaster Sterling A/T with Brake Buddy Select