Today, Palestinian news site Safa seems to claim that the GRM has been abolished. It quotes Vice President of the Palestinian Federation of Industries, Ali Al-Hayek, that this is a major achievement for Gaza, because Israeli oversight over building materials were too intrusive.
I cannot find any corroboration for this.
The GRM website still exists, and it includes projects as recent as last week. Israel approved construction materials to enter Gaza earlier this month using the GRM.
Of course, it seems unlikely that Israel would agree for mass imports of construction material without the GRM, and Egypt is not likely to want to bypass GRM and send materials straight to the Hamas-run Gaza government.