GL routers all have a Uboot web interface in case you brick them. You might have done something wrong when you DIY your firmware, but you can eventually save your router by flashing the default firmware back using Uboot Web UI. The processes of entering the Web UI for different routers are more or less the same.
The common procedure:
{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}