GVR2000 height - EPSG:8266

WKT

VERTCS["GVR2000_height", 
	VDATUM["Greenland_Vertical_Reference_2000"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["GVR2000_height", 
	VDATUM["Greenland_Vertical_Reference_2000"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "8266"]]

Data from @esri/proj-codes

{
  "wkid": 8266,
  "latestWkid": 8266,
  "macro": "PE_VCS_GVR2000_HT",
  "name": "GVR2000_height",
  "wkt": "VERTCS[\"GVR2000_height\",VDATUM[\"Greenland_Vertical_Reference_2000\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"GVR2000_height\",VDATUM[\"Greenland_Vertical_Reference_2000\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"8266\"]]",
  "description": "GVR2000 height",
  "authority": "EPSG",
  "version": "9.2(10.8.0)",
  "deprecated": "no",
  "areaname": "Greenland - 59~N to 84~N",
  "extent": {
    "slat": 59,
    "nlat": 84.01,
    "llon": -75,
    "rlon": -10
  }
}