GCVD54 height (Intl Feet) - EPSG:6130

WKT

VERTCS["GCVD54_height", 
	VDATUM["Grand_Cayman_Vertical_Datum_1954"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Foot", 0.3048]]

WKT2

VERTCRS["GCVD54_height", 
	VDATUM["Grand_Cayman_Vertical_Datum_1954"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Foot", 0.3048]], 
	ID["EPSG", "6130"]]

Data from @esri/proj-codes

{
  "wkid": 6130,
  "latestWkid": 6130,
  "macro": "PE_VCS_GCVD54_HT",
  "name": "GCVD54_height",
  "wkt": "VERTCS[\"GCVD54_height\",VDATUM[\"Grand_Cayman_Vertical_Datum_1954\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Foot\",0.3048]]",
  "wkt2": "VERTCRS[\"GCVD54_height\",VDATUM[\"Grand_Cayman_Vertical_Datum_1954\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Foot\",0.3048]],ID[\"EPSG\",\"6130\"]]",
  "description": "GCVD54 height (Intl Feet)",
  "authority": "EPSG",
  "version": "8.1.2(10.2.1)",
  "deprecated": "no",
  "areaname": "Cayman Islands - Grand Cayman",
  "extent": {
    "slat": 19.21,
    "nlat": 19.41,
    "llon": -81.46,
    "rlon": -81.04
  }
}