Of all the years that I have been going there it has never been NOTAMed.
They will not stop you diverting directly to AGP (therefore no need for a NOTAM) but if you do then you will have go AGP-TNG-AGP empty before they will allow you to carry your (bussed) passengers from AGP back tothe UK.
Things were resolved with the Spanish for a while and diverts could go straight to AGP but evidently diplomatic relations are not so good anymore so back to TNG.