Poland also wanted to remove daylight savings time (the project was in the lower house) but ultimately it was rejected because all EU countries need to use the same time (DST). It seems Finland is taking it further...
GMT as a time standard is defunct. The Mean Sun no longer traverses his notional sky.
GMT as a civil time zone is based on atomic measures[0]. It is not measured from the meridian. This is the phrase used to indicate this in UK legislation:
In these Regulations Co-ordinated Universal Time (UTC) is the same time as Greenwich Mean Time (GMT)
[0] Time scale UTC(NPL)